#和##运算符实例

1.#include <stdio.h>

#define NAME(n) name##n

int main()
{

    int NAME(1);
    int NAME(2);

    NAME(1) = 1;
    NAME(2) = 2;

    printf("%d\n", NAME(1));
    printf("%d\n", NAME(2));

    return 0;
}

2.#include <stdio.h>

#define CONVERS(x) #x

int main()
{

    printf("%s\n", CONVERS(Hello world!));
    printf("%s\n", CONVERS(100));
    printf("%s\n", CONVERS(while));
    printf("%s\n", CONVERS(return));

    return 0;
}

//#运算符用于在预编译期将宏参数转换为字符串