I simple program that I wrote to accept string from the user in lowercase and convert it into upper case format in C++ programming language.

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Program Listing

// lowercase_uppercase.cpp
// Prof. Jake Rodriguez Pomperada, MAED-IT, MIT
// www.jakerpomperada.blogspot.com and www.jakerpomperada.com
// jakerpomperada@gmail.com
// Bacolod City, Negros Occidental Philippines
// Dev C++ Version 5.11

#include <iostream>
#include <string>

using namespace std;

int main()
    string str;
   cout << "\n\n";
   cout << "\tLower Case To Upper Case String Conversion in C++";
   cout << "\n\n";
   cout << "\tEnter a String : ";
    for (size_t i = 0; i < str.length(); ++i)

    cout << "\n\n";
    cout<<"\tConverted Results in Upper Case : "  <<str << ".";
    cout << "\n\n";
    cout << "\tEnd of Program";
    cout << "\n\n";