求12+23+……+n*(n+1)的前15项的和
/*
求12+23+……+n*(n+1)的前15项的和
*/
#include <stdio.h>
static int funAdd(int first,int count)
{
int result = 0;
if(count < 0 )
{
return -1;
}
while(count--)
{
result += (first * 10) + (first+1);
first++;
}
return result;
}
int main(void)
{
int result = -1;
result = funAdd(1,15);
printf("result = %d \n",result);
return 0;
}