6.4 求 ，（即求1！+2！+3！+4！+5！+...+n！）用C语言

#include <stdio.h>

int main() {
int n, i, j, factorial;
printf("请输入n的值：");
scanf("%d", &n);
printf("1! 2! 3! ... %d! 的值分别为：\n", n);
for (i = 1; i <= n; i++) {
factorial = 1;
for (j = 1; j <= i; j++) {
factorial *= j;
}
printf("%d! = %d\n", i, factorial);
}
return 0;
}