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How to Write a programe in C++ to Convert the string(s) to uppercase?

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

int main()

}

string IwTxt;

cout << "\nPlease Enter the String to Convert into Uppercase = ""; getline(cin, IwTxt);

for (int i = 0; i < IwTxt.length(); i++)

{

IwTxt[i] = toupper(IwTxt[i]);

}

cout<<"\nThe Given String in Uppercase = " << IwTxt;

}

return 0;