题目:​​http://acm.hdu.edu.cn/showproblem.php?pid=1161​

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;
int main()
{
string a;
while(getline(cin,a))
{
for(int i=0;i<a.length();i++)
{
if(a[i]>='A'&&a[i]<='Z')
a[i]+=32;
cout<<a[i];
}
cout<<endl;
}
return 0;
}