题解

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
    string str[101];
    cin >> n;
    for (int i = 1 ; i <= n ; i++){
        cin >> str[i];
        if (str[i][0] >= 'a' && str[i][0] <= 'z')
        	str[i][0] = char(int(str[i][0]) - 32);  //开头字母小写转大写
        for(int j = 1 ; j < str[i].size() ; j++){
            if (str[i][j] >= 'A' && str[i][j] <= 'Z')  //中间字母大写转小写
                str[i][j] = char(int(str[i][j]) + 32);
        }
    }
    for (int i = 1 ; i <= n ; i++)
        cout << str[i] << "\n";
    return 0;
}