What is the difference between g++ and gcc?

The gcc and g++ are both GNU compiler collection tools, but they serve different purposes. gcc is primarily designed for C programs, while g++ is designed for C++ programs. Understanding their differences helps choose the right compiler for your project.

Syntax

gcc program.c -o executable_name
g++ program.cpp -o executable_name

gcc (GNU C Compiler)

The gcc compiler is specifically designed to compile C programs. It treats files with .c extension as C source code and links against the standard C library by default.

Example: Using gcc for C Program

#include <stdio.h>

int main() {
    int a = 20;
    printf("The value of a: %d\n", a);
    return 0;
}

The value of a: 20

Compilation: Save the code as program.c and compile using: gcc program.c -o program

g++ (GNU C++ Compiler)

The g++ compiler is designed for C++ programs. It can compile both .c and .cpp files, but treats them as C++ source code and links against the C++ standard library.

Example: Using g++ for C++ Program

#include <stdio.h>

int main() {
    int a = 20;
    printf("The value of a: %d\n", a);
    return 0;
}

The value of a: 20

Compilation: Save the code as program.cpp and compile using: g++ program.cpp -o program

Key Differences

Conclusion

Use gcc for pure C programs and g++ for C++ programs. While g++ can compile C code, gcc is more appropriate for C-only projects as it provides better optimization and avoids unnecessary C++ library linking.