计算1！+2！+. . . +10！的值
#include <stdio.h>
#include <stdlib.h>
int main()
{
int n = 0;
int ret = 1;
int sum = 0;
for (n = 1; n <= 10; n++)
{
ret = ret*n;
sum = sum + ret;
}
printf("sum=%d\n ", sum);
system(“pause”);
return 0;
}
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