voidfun(){ std::cout<<"Hello fun!"<<std::endl; } 1. 2. 3. 4. 5. #ifndef _FUN_ voidfun(); #endif 1. 2. 3. 4. 5. 将main.c文件也补一些代码 #include <iostream> #include "fun.h" intmain(intargc,char*argv[]) { std::cout<<"Hello world!"<<std::endl; fun(); } 1...
/usr/bin/ld: /tmp/cc4VfTO1.o: in function `main': /home/fatblabs/c++/helloworld.cpp:6: undefined reference to `std::cout' /usr/bin/ld: /home/fatblabs/c++/helloworld.cpp:6: undefined reference to `std::cout' /usr/bin/ld: /home/fatblabs/c++/helloworld.cpp:6: undefined referenc...
C:\Users\Dylan\AppData\Local\Temp\ccJuQfKx.o:ok.cpp:(.text+0x70):undefined reference to `std::ios_base::Init::Init()' C:\Users\Dylan\AppData\Local\Temp\ccJuQfKx.o:ok.cpp:(.rdata$.refptr._ZSt4cout[.refptr._ZSt4cout]+0x0):undefined reference to `std::cout' collect2.exe:...
d:/c++/test_sfml/test_graphics.cpp:6: undefined reference to `sf::String::String(char const*, std::locale const&)' d:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: d:/c++/test_sfml/test_graphics.cpp:6: undefined reference to `sf::VideoM...
一、undefined reference to 问题分析 错误如下: undefined reference to `mysql_init' undefined reference to `mysql_real_connect' 这个问题的原因大概率是:(默认VsCode和mysql的配置没有问题) 没有链接到库文件 解决方法就是链接mysql的库文件。(如果在Vsual studio中可能就直接在首选项中添加依赖文件路径了,但在...
.h> #include <mysql.h> int main(){ MYSQL* conn; conn = mysql_init(0); conn = mysql_real_connect(conn, "localhost", "root", "", "airlines_db", 0, NULL, 0); if(conn){ std::cout << "Connected" << std::endl; } else { std::cout << "Not connected" << std::endl; ...
2.undefined reference to `WinMain’ 原因:主函数 int main(){ }未命名正确! 3.‘cout不明确’ 解决方法:删掉using namespace std;保存一下,然后重写一下using namespace std;至于为什么?咱也搞不懂。 4.Error:redefinition of class xxx 一般出现错误 redefinition of class xxx 同时也会有错误 previous defi...
std::cout<< std::format("a = {0}, b = {1}", a, b) <<std::endl;//输出:a = 1, b = 2} 以下是详细步骤: 1.首先下vscode的C++插件 输入了代码但不能直接编译运行代码,所以我们还需要下载最新版的C++20 MinGW。 2、去官网下载gcc最新版本 ...
std::cout << key << std::endl; if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) glfwSetWindowShouldClose(window, GL_TRUE); // ESC 关闭 } CMakeLists.txt cmake_minimum_required(VERSION 3.0.0) project(test001 VERSION 0.1.0) ...
void testfunction(){ std::cout << "works" << std::endl; return; } by running the programm I get the folling error message: The compiler does not give an error because by the #include of testy_2.hpp the compiler knows that "void testfunction()" exists. But the linker than does ...