Vowel Counting

4
XYz
application
qwcvb
aeioOa 

xyz
ApplIcAtIOn
qwcvb
AEIOOA

解题思路：水题一枚，字符大小写转化问题。

AC代码：

#include <iostream>
#include <cstdio>
#include <string>
using namespace std;

int main(){
//    freopen("in.txt", "r", stdin);
    int t;
    string s;
    while(scanf("%d", &t)!=EOF){
        cin>>s;
        for(int i=0; i<s.size(); i++){
            if(s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u' || s[i] == 'A' || s[i] == 'E' || s[i] == 'I' || s[i] == 'O' || s[i] == 'U'){
                if(s[i]>='a' && s[i]<='z')  s[i] -= 32;
                printf("%c", s[i]);    
            }
            else{
                if(s[i]>='A' && s[i]<='Z')  s[i] += 32;
                printf("%c", s[i]);    
            }
        }
        printf("\n");    
    }
    return 0;
}

HDU 3079 Vowel Counting （水）

原文：http://blog.csdn.net/u013446688/article/details/41122979