C Exercise Example 25
100 cases of classic C language
Title: Demand 1 + 2 + 3 + ... + 20 and!!!.
Program Analysis: This program just multiply accumulate become tired.
Source Code:
// Created by www.w3big.com on 15/11/9.
// Copyright © 2015年 本教程. All rights reserved.
//
#include <stdio.h>
int main()
{
int i;
long double sum,mix;
sum=0,mix=1;
for(i=1;i<=20;i++)
{
mix=mix*i;
sum=sum+mix;
}
printf("%Lf\n",sum);
}
The above example output is:
2561327494111820313.000000