编写test2.c

#include <stdio.h>

int main(int argc, char const *argv[])
{
    int i = 2;
    int j = 3;
    
    int sum = i + j;

    printf("%d\n", sum);

    return 0;
}

编译运行

zhoumengkang@bogon:~/Downloads$ gcc test2.c -o test2
zhoumengkang@bogon:~/Downloads$ ./test2
5