首先，设定变量int p = 1;int i = 0;int sum = 0;int x = 0;其次，设计阶乘的函数int jc(int p, int i){ for (; i != 1; i -= 1) p *= i; return p;};最后，设计主函数int main(){ printf("求解n!+(n-1)!+...+1!"); printf("请输入n"); sca
1、求阶乘 n！int main() {
int i, n, ret;
printf("输入n的值：");
scanf("%d", &n);
ret = 1;
for (i = 1; i <= n; i++) {
ret = ret * i;
}
printf("n!= %d",ret);
return 0;
}2、求阶乘之和 n!+(n-1)!+.
#include<stdio.h>int main(){ int a = 0; int n = 1; int sum = 0; int i = 0; scanf("%d", &i); for (a = 1; a <= i; a++) { n = n * a; sum = sum + n; } printf("%d", sum); ret
