C++ Program to convert Lower Case String to Uppercase String

#include<iostream>

#include<iomanip>

#include<string.h>

using namespace std;

 int main

{

int i;

char arr[20];

cout<<"==========================\n";

cout<<"String Program\n";

cout<<"==========================\n";

cout<<"Enter Lower Case String :";

cin.getline(arr,20);

cout<<"Uppercase string is : ";

for(i=0;arr[i]!='\0';i++)

{

arr[i]=arr[i]-32;

cout<<arr[i];

}

arr[i]='\0';

}