HDU 1161 Eddy's mistakes

Problem Description

Eddy usually writes articles ,but he likes mixing the English letter uses, for example “computer science” is written frequently “coMpUtEr scIeNce” by him, this mistakes lets Eddy’s English teacher be extremely discontentment.Now please you to write a procedure to be able in the Bob article English letter to turn completely the small letter.

Input

The input contains several test cases.each line consists a test case，Expressed Eddy writes in an article , by letter, blank space,numeral as well as each kind of punctuation
composition, the writing length does not surpass 1000 characters.

Output

For each test case, you should output an only line, after namely the result of transforms the lowercase letter.

Sample Input

weLcOmE tO HDOj Acm 2005!

Sample Output

welcome to hdoj acm 2005!

题目大意：

多种测试数据，输入一行字符串包括字母，标点和数字。要求将字符串中的大写字母全部转换为小写字母。

c++

#include <iostream>
#include<cstring>
#include<cstdio>
using namespace std;
int main()
{
    char a[10000];
    int b,c,d,e;
    while(gets(a))
    {
        b=strlen(a);
        for(c=0;c<b;c++)
        {
            if(a[c]>='A'&&a[c]<='Z')    //判断是否为大写字母
            {
                a[c]=a[c]+32;
            }
        }
        cout<<a<<endl;
    }
    return 0;
}