#include<stdio.h> int main() { int i,j,n,m=1,sum=0; printf("input n="); scanf("%d",&n); for(i=1;i<=n;i++) {m=1; {for(j=1;j<=i;j++) m*=j;} sum+=m;} printf("sum1!~n!=%d",sum); return 0; }发布...