5-2.cpp

希望大家喜欢

# include<stdio.h>
 int main(void)
 int a,n;
 
{
	int sum = 0;

	int fn(int a,int n);

	printf("Enter a,n:");
	scanf("%d%d",&a,&n);

	sum = sum + fn(a,n);
	printf("sum =%d\n",sum);

	}
 int fn(int a,int n)
 {
	 int y;
	 
	 for(i=0;i<n;i++)
		 fn(a,n) = a*i;
	 return fn(a,n) ;

 }