#define MACRO "aaa"
#define M 12
#include<stdio.h>;
void main()
{
printf(" %s\n ", MACRO);
printf(" %d\n ", M);
}
//宏可以复制给变量
#define MACRO "aaa"
#define M 12
#include<stdio.h>;
void main()
{
int y;
y=M;
printf(" %s\n ", MACRO);
printf(" %d\n ", M);
printf(" %d\n ", y);
}