Program to Convert Lowercase to Uppercase in CPP

file.cpp

#include<iostream>
using namespace std;
int main()
{
    char str[20];
    int i=0;
    cout<<"Enter String :";
    cin>>str;
    for(i=0;str[i]!='';i++)
    
    {
        if(str[i]>=97 && str[i]<=122){
            str[i]=str[i]-32;
            
        }
        
    }

    cout<<"Converted String :"<<str;
}