gcc和g ++ / gcc-c ++有什么区别？

What's the difference between gcc and g++/gcc-c++?

在我看来，GCC可以同时处理C和C++项目，那么为什么需要G++/GCC-C++？

G++和GCC-C++有什么区别？

如果文件具有适当的扩展，EDCOX1 0将编译C源文件作为C++的C++源文件，但它不会自动在C++库中链接。

EDCOX1(1)将自动包含C++库；默认情况下，它还会用扩展名编译文件，这些文件表示它们是C++源，而不是C。

从http://gcc.gnu.org/onlinedocs/gcc/invoking-g_u 002b.html invoking-g b_u 002b：

C++ source files conventionally use one of the suffixes .C, .cc, .cpp, .CPP, .c++, .cp, or .cxx; C++ header files often use .hh, .hpp, .H, or (for shared template code) .tcc; and preprocessed C++ files use the suffix .ii. GCC recognizes files with these names and compiles them as C++ programs even if you call the compiler the same way as for compiling C programs (usually with the name gcc).

However, the use of gcc does not add the C++ library. g++ is a program that calls GCC and treats .c, .h and .i files as C++ source files instead of C source files unless -x is used, and automatically specifies linking against the C++ library. This program is also useful when precompiling a C header file with a .h extension for use in C++ compilations.

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例如，为了编译一个简单的C++程序，它可以写入EDCOX1×2流，我可以使用(MinGW在Windows上)：

g++-o test.exe test.cpp测试.cpp
gcc-o test.exe test.cpp-lstdc++

但如果我尝试：

gcc-o test.exe测试.cpp

我在链接时得到未定义的引用。

另一个区别是，以下C程序：

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#include <stdlib.h>
#include <stdio.h>

int main()
{
int* new;
int* p = malloc(sizeof(int));

*p = 42;
new = p;

printf("The answer: %d
", *new);

return 0;
}

编译并运行良好，使用：

gcc-o test.exe测试.c

但在编译时会出现以下错误：

g++-o test.exe测试.c

错误：

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test.c: In function 'int main()':
test.c:6:10: error: expected unqualified-id before 'new'
test.c:6:10: error: expected initializer before 'new'
test.c:7:32: error: invalid conversion from 'void*' to 'int*'
test.c:10:9: error: expected type-specifier before '=' token
test.c:10:11: error: lvalue required as left operand of assignment
test.c:12:36: error: expected type-specifier before ')' token

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