【C++ Primer】【练习题】【3.14】将vector<string>对象各元素中的小写字母转换成大写字母

谁践踏了优雅 2022-08-06 03:28 81阅读 0赞

要求：读一组单词到vector<string>对象，将对象各元素中的小写字母转换成大写字母并输出。

#include <iostream>
    #include <vector>
    #include <string>
    #include <cctype>
    
    using namespace std;
    
    int main()
    {
        vector<string> svec;
            string str;
    
        cout << "Please input text(EOF to end): ";
        while (cin >> str)
        {
            svec.push_back(str);
        }
    
        if (svec.size() == 0)
        {
            cout << "No text input!" << endl;
            return 0;
        }
    
            cout << "The output words are: " << endl;
    
        // 将元素中的小写字母转换成大写字母
        for (vector<string>::size_type i = 0; i < svec.size(); i++)
        {
                    for (string::size_type j = 0; j < svec[i].size(); j++)
                    {
                            if (islower(svec[i][j]))
                            {
                                    svec[i][j] = toupper(svec[i][j]);
                            }
                    }
    
                    cout << svec[i] << " ";
    
                    if ((i + 1) % 8 == 0)
                    {
                            cout << endl;
                    }
        }
        
            cout << endl;
        return 0;
    }

[chapter3]$ ./a.out 
    Please input text(EOF to end): No text input! 
    [chapter3]$ ./a.out 
    Please input text(EOF to end): a B c D e F g 
    The output words are: 
    A B C D E F G 
    [chapter3]$ ./a.out 
    Please input text(EOF to end): a B c D e F g H i J k L m N o P q R s T u V w X y Z 
    The output words are: 
    A B C D E F G H 
    I J K L M N O P 
    Q R S T U V W X 
    Y Z