Ошибка unknown type name string

I’m new to C++ and have had some help with my program to compare two XML files. This is the code I have:

#include "pugixml.hpp"

#include <iostream>
#include <unordered_map>

int main() {
    pugi::xml_document doca, docb;
    std::map<string, pugi::xml_node> mapa, mapb;

    if (!doca.load_file("a.xml") || !docb.load_file("b.xml"))
        return 1;

    for (auto& node: doca.child("site_entries").children("entry")) {
        const char* id = node.child_value("id");
        mapa[new std::string(id, strlen(id))] = node;
    }

    for (auto& node: docb.child("site_entries").children("entry"))
        const char* idcs = node.child_value("id");
        std::string id = new std::string(idcs, strlen(idcs));
        if (!mapa.erase(id)) {
            mapb[id] = node;
        }
    }

}

I seem to get a lot of errors when I try and compile it.

The first one I get is this:

src/main.cpp:10:14: error: unknown type name 'string'; did you mean 'std::string'?
    std::map<string, pugi::xml_node> mapa, mapb;
        ~~~~~^~~

From what I understand, I have specified it correctly. Should I change it as it requests or is something else a-miss?

Источник

I’m new to C++ and have had some help with my program to compare two XML files. This is the code I have:

#include "pugixml.hpp"

#include <iostream>
#include <unordered_map>

int main() {
    pugi::xml_document doca, docb;
    std::map<string, pugi::xml_node> mapa, mapb;

    if (!doca.load_file("a.xml") || !docb.load_file("b.xml"))
        return 1;

    for (auto& node: doca.child("site_entries").children("entry")) {
        const char* id = node.child_value("id");
        mapa[new std::string(id, strlen(id))] = node;
    }

    for (auto& node: docb.child("site_entries").children("entry"))
        const char* idcs = node.child_value("id");
        std::string id = new std::string(idcs, strlen(idcs));
        if (!mapa.erase(id)) {
            mapb[id] = node;
        }
    }

}

I seem to get a lot of errors when I try and compile it.

The first one I get is this:

src/main.cpp:10:14: error: unknown type name 'string'; did you mean 'std::string'?
    std::map<string, pugi::xml_node> mapa, mapb;
        ~~~~~^~~

From what I understand, I have specified it correctly. Should I change it as it requests or is something else a-miss?

Источник

I’m working on a C++ header file and I keep getting the error «Unknown type name ‘string’; did you mean ‘std::string’?» #include <string> is already at the top of my code, so I’m not sure how else to remedy this issue. Any thoughts? I’m using Xcode, if that makes any difference.

#ifndef POINT_HPP
#define POINT_HPP
#include <string>
using namespace std;

class Point {
public:
    Point();
    Point(int pInitX, int pInitY);
    Point(int pInitX, int pInitY, int pInitColor);
    double distance(Point pAnotherPoint);
    int getColor();
    int getX();
    int getY();
    void move(int pNewX, int pNewY);
    void setColor(int pNewColor);
    void setX(int pNewX);
    void setY(int pNewY);
    string toString; // Error: Unknown type name 'string'; did you mean 'std::string'?
private:
    void init(int pInitX, int pInitY, int pInitColor);
    int mColor;
    int mX;
    int mY;
};

#endif

asked Apr 3, 2016 at 1:52

m-use's user avatar

5

you must use std::string toString()or declare using namespace std;globally

answered Apr 3, 2016 at 2:53

Daniel's user avatar

DanielDaniel

661 silver badge9 bronze badges

Make sure to also set the path to the Point class (header and cpp) inside CMakeLists.txt.

If you are using QT, it should be something like

set(PROJECT_SOURCES
        ...
        point.cpp
        point.h
)

After that you need to import the string class at the top like this #include <string> and then declare using namespace std;

answered Oct 18, 2021 at 10:06

Ahmad Khudeish's user avatar

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  • Unknown type name ‘string’

Unknown type name ‘string’

I’m trying to compile my code .cpp but even though I include the libraries I get those errors:

error: unknown type name
‘string’
static string* split(string s);

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#include "../../include/kingsort/KingSort.h"
#include <iostream>
#include <string>
using namespace std;


string* KingSort::split(string s) {
    string* arr = new string[2];
    stringstream X(s);
    unsigned int i = 0;
    while (getline(X,arr[i], ' ')) {
        i++;
    }
    return arr;
}

For instance, the MakeFile is as follows:

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rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))

SOURCE_FILES = $(call rwildcard, , *.cpp)
OBJECT_FILES = $(SOURCE_FILES:.cpp=.o)

all: build build/main clean_objects

build:
	mkdir -p build

build/main: $(OBJECT_FILES)
	g++ -g $^ -std=c++11 -o $@

%.o: %.cpp
	g++ -g -std=c++11 -c $^ -o $@

clean_objects: $(OBJECT_FILES)
	rm $^

Why am I getting those errors? Thanks!

Did you include <string> in KingSort.h?

Oh I didn’t! Thanks!

Topic archived. No new replies allowed.

Источник

Information:Gradle tasks [:assembleArm7Debug]
Warning:Dependency org.json:json:20090211 is ignored for arm7Debug as it may be conflicting with the internal version provided by Android.
Warning:Dependency org.json:json:20090211 is ignored for arm7Release as it may be conflicting with the internal version provided by Android.
Warning:Dependency org.json:json:20090211 is ignored for x86Debug as it may be conflicting with the internal version provided by Android.
Warning:Dependency org.json:json:20090211 is ignored for x86Release as it may be conflicting with the internal version provided by Android.
/Users/chenhongyu/code/android-ndk-r10e/platforms/android-19/arch-arm/usr/include/jni.h
Information:(78, 25) ‘jstring’ declared here
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofxAndroidVideoPlayer.h
Error:(23, 13) error: unknown type name ‘string’; did you mean ‘jstring’?
Warning:(23, 8) warning: ‘ofxAndroidVideoPlayer::load’ hides overloaded virtual function [-Woverloaded-virtual]
/Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/video/ofVideoPlayer.cpp
Information:(26, 18) in instantiation of function template specialization ‘std::__1::make_shared’ requested here
/Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/types/ofBaseTypes.h
Information:(467, 21) hidden overloaded virtual function ‘ofBaseVideoPlayer::load’ declared here: type mismatch at 1st parameter (‘std::string’ (aka ‘basic_string<char, char_traits, allocator >’) vs ‘jstring’ (aka ‘_jstring *’))
Information:(467, 21) unimplemented pure virtual method ‘load’ in ‘ofxAndroidVideoPlayer’
/Users/chenhongyu/code/android-ndk-r10e/sources/cxx-stl/llvm-libc++/libcxx/include/memory
Error:(2035, 9) error: field type ‘ofxAndroidVideoPlayer’ is an abstract class
Information:(2302, 15) in instantiation of template class ‘std::__1::__libcpp_compressed_pair_imp<std::__1::allocator, ofxAndroidVideoPlayer, 1>’ requested here
Information:(3689, 36) in instantiation of template class ‘std::__1::__compressed_pair<std::__1::allocator, ofxAndroidVideoPlayer>’ requested here
Information:(4271, 26) in instantiation of template class ‘std::__1::__shared_ptr_emplace<ofxAndroidVideoPlayer, std::__1::allocator >’ requested here
Information:(4630, 29) in instantiation of function template specialization ‘std::__1::shared_ptr::make_shared<>’ requested here
Error:(4274, 18) error: assigning to ‘std::__1::__shared_weak_count *’ from incompatible type ‘pointer’ (aka ‘std::__1::__shared_ptr_emplace<ofxAndroidVideoPlayer, std::__1::allocator > *’)
/Users/chenhongyu/code/android-ndk-r10e/sources/cxx-stl/llvm-libc++/libcxx/include/iterator
Information:(1239, 53) ‘std::vector’ declared here
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofxAndroidVideoGrabber.h
Error:(22, 2) error: no template named ‘vector’; did you mean ‘std::vector’?
Error:(93, 2) error: unknown type name ‘shared_ptr’
Error:(93, 12) error: expected member name or ‘;’ after declaration specifiers
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofxAndroidSoundPlayer.h
Error:(11, 12) error: unknown type name ‘string’; did you mean ‘jstring’?
Warning:(11, 7) warning: ‘ofxAndroidSoundPlayer::load’ hides overloaded virtual function [-Woverloaded-virtual]
/Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/sound/ofBaseSoundPlayer.h
Information:(19, 18) hidden overloaded virtual function ‘ofBaseSoundPlayer::load’ declared here: type mismatch at 1st parameter (‘const std::filesystem::path &’ vs ‘jstring’ (aka ‘_jstring *’))
/Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/app/ofAppBaseWindow.h
Information:(45, 20) overridden virtual function is here
virtual glm::vec2 getWindowPosition() {return glm::vec2(); }
~~~~~~~~~ ^
In file included from /Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/app/ofMainLoop.cpp:19:
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofAppAndroidWindow.h:40:10: error: virtual function ‘getWindowSize’ has a different return type (‘ofPoint’ (aka ‘ofVec3f’)) than the function it overrides (which has return type ‘glm::vec2’ (aka ‘tvec2<float, highp>’))
ofPoint getWindowSize();
~~~~~~~ ^
/Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/app/ofAppBaseWindow.h:46:20: note: overridden virtual function is here
virtual glm::vec2 getWindowSize(){return glm::vec2(); }
~~~~~~~~~ ^
In file included from /Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/app/ofMainLoop.cpp:19:
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofAppAndroidWindow.h:41:10: error: virtual function ‘getScreenSize’ has a different return type (‘ofPoint’ (aka ‘ofVec3f’)) than the function it overrides (which has return type ‘glm::vec2’ (aka ‘tvec2<float, highp>’))
ofPoint getScreenSize(){return getWindowSize(); }
~~~~~~~ ^
/Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/app/ofAppBaseWindow.h:47:20: note: overridden virtual function is here
virtual glm::vec2 getScreenSize(){return glm::vec2(); }
~~~~~~~~~ ^
In file included from /Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/app/ofMainLoop.cpp:19:
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofAppAndroidWindow.h:48:22: error: unknown type name ‘string’; did you mean ‘std::string’?
void setWindowTitle(string title){}
^~~~~~
std::string
/Users/chenhongyu/code/android-ndk-r10e/sources/cxx-stl/llvm-libc++/libcxx/include/iosfwd:189:65: note: ‘std::string’ declared here
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofAppAndroidWindow.h
Error:(39, 10) error: virtual function ‘getWindowPosition’ has a different return type (‘ofPoint’ (aka ‘ofVec3f’)) than the function it overrides (which has return type ‘glm::vec2’ (aka ‘tvec2<float, highp>’))
Error:(62, 2) error: unknown type name ‘shared_ptr’
Error:(62, 12) error: expected member name or ‘;’ after declaration specifiers
Error:(69, 2) error: unknown type name ‘shared_ptr’
Error:(69, 12) error: expected member name or ‘;’ after declaration specifiers
/Users/chenhongyu/code/android-ndk-r10e/sources/cxx-stl/llvm-libc++/libcxx/include/iosfwd
Information:(189, 65) ‘std::string’ declared here
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofxAndroidLogChannel.h
Error:(16, 35) error: unknown type name ‘string’; did you mean ‘std::string’?
Error:(16, 58) error: unknown type name ‘string’; did you mean ‘std::string’?
Error:(17, 38) error: unknown type name ‘string’; did you mean ‘std::string’?
Error:(18, 38) error: unknown type name ‘string’; did you mean ‘std::string’?
/Users/chenhongyu/code/openFrameworks-master/libs/openFrameworks/utils/ofUtils.cpp
Error:(1130, 3) error: no matching function for call to ‘ofxAndroidLaunchBrowser’
/Users/chenhongyu/code/openFrameworks-master/addons/ofxAndroid/src/ofxAndroidUtils.h
Error:(62, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(63, 27) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(65, 28) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(66, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 46) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(68, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 49) error: no template named ‘vector’; did you mean ‘std::vector’?
Error:(69, 56) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(71, 22) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 31) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(82, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(86, 30) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(95, 35) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(62, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(63, 27) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(65, 28) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(66, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 46) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(68, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 49) error: no template named ‘vector’; did you mean ‘std::vector’?
Error:(69, 56) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(71, 22) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(62, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(63, 27) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(65, 28) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(66, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 46) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(68, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 49) error: no template named ‘vector’; did you mean ‘std::vector’?
Error:(69, 56) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(71, 22) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 31) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(82, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(86, 30) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(95, 35) error: unknown type name ‘string’; did you mean ‘jstring’?
Information:(86, 6) candidate function not viable: no known conversion from ‘std::string’ (aka ‘basic_string<char, char_traits, allocator >’) to ‘jstring’ (aka ‘_jstring *’) for 1st argument
Error:(62, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(63, 27) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(65, 28) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(66, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 46) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(68, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 49) error: no template named ‘vector’; did you mean ‘std::vector’?
Error:(69, 56) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(71, 22) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 31) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(82, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(86, 30) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(95, 35) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(62, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(63, 27) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(65, 28) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(66, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 46) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(68, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 49) error: no template named ‘vector’; did you mean ‘std::vector’?
Error:(69, 56) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(71, 22) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 31) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(82, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(86, 30) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(95, 35) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(62, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(63, 27) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(65, 28) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(66, 25) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(67, 46) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(68, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 29) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(69, 49) error: no template named ‘vector’; did you mean ‘std::vector’?
Error:(69, 56) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(71, 22) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(80, 31) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(82, 1) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(86, 30) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:(95, 35) error: unknown type name ‘string’; did you mean ‘jstring’?
Error:Execution failed for task ‘:openFrameworksProject:compileOpenFrameworksLibArmeabi-v7aDebugArm7StaticLibraryOpenFrameworksLibMainCpp’.

Multiple build operations failed.
C++ compiler failed while compiling ofVideoPlayer.cpp.
C++ compiler failed while compiling ofVideoGrabber.cpp.
C++ compiler failed while compiling ofThread.cpp.
C++ compiler failed while compiling ofAppRunner.cpp.
C++ compiler failed while compiling ofMainLoop.cpp.
C++ compiler failed while compiling ofLog.cpp.
C++ compiler failed while compiling ofUtils.cpp.
C++ compiler failed while compiling ofFbo.cpp.
C++ compiler failed while compiling ofShader.cpp.
C++ compiler failed while compiling ofVboMesh.cpp.
…and 6 more failures.
See the complete log at: file:///Users/chenhongyu/code/openFrameworks-master/libs/openFrameworksCompiled/project/android/build/tmp/compileOpenFrameworksLibArmeabi-v7aDebugArm7StaticLibraryOpenFrameworksLibMainCpp/output.txt
Information:BUILD FAILED
Information:Total time: 5 mins 28.449 secs
Information:109 errors
Information:6 warnings
Information:See complete output in console

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