#define _CRT_SECURE_NO_WARNINGS//用于求1!+2!+...+n! #include<stdio.h> int main() { int n=0; int i=0; int j=0; int sum=0; scanf("%d",&n);// 用于接收n的值 for(i=1;i<=n;i++) { int ret=1; for(j=1;j<=i;j++) { ret*=j; } sum+=ret; } printf("%d\n",sum); return 0; }
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