供参考:
#include<stdio.h>
int main()
{
int n = 10, i, s, r;
for (i = 1, s = 0, r = 1; i <= n; i++)
{
r *= i;
s += r;
}
printf("%d", s);
return 0;
}
#include <stdio.h>
int main()
{
int i,j,res = 0;
double sum = 1;
for(i = 1;i <= 10;i++){
sum = 1;
for(j = 1;j <= i;j++){
sum = sum * j;
}
res += sum;
}
printf("%d", res);
return 0;
}