C语言求n个数的阶乘和,使用for语句循环,一定要用套嵌for语句吗?不用套...答:当然可以用单层循环!看——include "stdio.h"int main(int argc,char *argv[]){int i,t,k,n;printf("Please enter n(int 0<n<13)...\n");if(scanf("%d",&n)!=1 || n<1 || n>12){printf("Input error, exit...\n");return 0;}for(k=0,t=i=1;i<=n;t*=i++,k...