#include<stdio.h> #define A(x) x;x;x;x;x;x;x;x;x;

#include<stdio.h>
#define A(x) x;x;x;x;x;x;x;x;x;x;
main()
{
int n=0;
A(A(A(printf("%d ",n++))));
return 0;
}

x;x;x;x;x;x;x;x;x;x;这句怎么理解位乘以10次

A(printf("%d ",n++))等价于printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);printf("%d ",n++);共10个
A(A(printf("%d ",n++)))相当于又执行10次A(printf("%d ",n++))
A(A(A(printf("%d ",n++))))相当于又执行10次A(A(printf("%d ",n++)))
printf("%d ",n++);语句执行了10*10*10次

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