c++ - 如何在C++中将小写字符串转换为大写字符串

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How to convert std::string to lower case?
                                
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我该如何使该程序接受大写和小写ID。从文件读取时，id为大写。id的形式为S2345。请帮助。

   cout << "Enter client ID TO Change email";
   cin >> ids;

  for(int i=0; i<rec; i++)

        if(client[i].ID == ids){
            cout << "\nEnter New email\n";
            cin  >> client[i].email;

        }

最佳答案

#include <boost/algorithm/string.hpp>
#include <string>

std::string str = "Hello World";

boost::to_upper(str);

关于c++ - 如何在C++中将小写字符串转换为大写字符串，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/29229555/