非常简单的程序不能在 C++ 中工作？
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Very simple program not working in c++?
提问by spatara
I can't figure out why this isn't working...
我不明白为什么这不起作用......
I am working in Linux
我在 Linux 工作
g++ doesn't do anything
g++ 什么都不做
gcc prints the following:
gcc 打印以下内容：
/tmp/ccyg7NDd.o: In function `main':
test.cc:(.text+0x14): undefined reference to `std::cout'
test.cc:(.text+0x19): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
test.cc:(.text+0x21): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
test.cc:(.text+0x29): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))'
/tmp/ccyg7NDd.o: In function `__static_initialization_and_destruction_0(int, int)':
test.cc:(.text+0x51): undefined reference to `std::ios_base::Init::Init()'
test.cc:(.text+0x56): undefined reference to `std::ios_base::Init::~Init()'
/tmp/ccyg7NDd.o:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status
Code:
代码：
#include<iostream>
#include<stdio.h>
int main(){
std::cout<<"test "<<std::endl;
return 0;
};
回答by kev
gcc main.cpp -lstdc++
or
或者
g++ main.cpp
回答by hmjd
gccis the C compiler, you need to use g++(or use gccwith option -lstdc++as pointed out by others). If by nothing is printed after you use g++is what you mean, you have to execute the compiled binary after you build it (i.e. when g++completes).
gcc是 C 编译器，您需要使用g++（或gcc与-lstdc++其他人指出的选项一起使用）。如果你使用后什么都不打印g++就是你的意思，你必须在构建后（即g++完成时）执行编译后的二进制文件。
main.cpp:
主.cpp：
#include<iostream>
int main(){
std::cout<<"test "<<std::endl;
return 0;
};
Build:
建造：
g++ main.cpp -o main
Execute:
执行：
./main
Output:
输出：
test
回答by sank
This is a C++ code and so you should use g++ and not gcc. Also #include<stdio.h>
is not needed
这是一个 C++ 代码，所以你应该使用 g++ 而不是 gcc。也#include<stdio.h>
没有必要
回答by Thomas Padron-McCarthy
I think you are mistakenly linking with the C compiler command instead of the C++ compiler command. Try this:
我认为您错误地与 C 编译器命令而不是 C++ 编译器命令链接。尝试这个：
g++ test.cc -o test
g++ test.cc -o 测试
回答by jjdaybr
I think the underlying issue for this is that the binary name "test" is actually already apart of the linux system. Typing in "man test" displays a manual for the test binary. I had the EXACT same issue. It was resolved simply by compiling the binary to something other than "test".
我认为这个问题的根本问题是二进制名称“test”实际上已经是 linux 系统的一部分。输入“man test”会显示测试二进制文件的手册。我有完全相同的问题。只需将二进制文件编译为“测试”以外的内容即可解决。
回答by gFu
Compilers delimit by whitespace. Put a space between all keywords and <<. So cout<< should be cout <<. Same with <
编译器用空格分隔。在所有关键字和 << 之间放置一个空格。所以 cout<< 应该是 cout <<。与 < 相同
