#include <iostream>
using namespace std;



void reverse(char *c)
{
int i = 0;

while(c[i] != '')
//for(int i = 0; i < 50; ++i)
{
if(c[i] == tolower(c[i]))
c[i] = toupper(c[i]);
else
c[i] = tolower(c[i]);

cout << c[i];
++i;
}
}


void upper(char *c)
{
int i = 0;
while(c[i] != '')
//for(int i = 0; i < 50; ++i)
{
c[i] = toupper(c[i]);
cout << c[i];
++i;
}
}


void lower(char* c)
{
int i = 0;
while(c[i] != '')
//for(int i = 0; i < 50; ++i)
{
c[i] = tolower(c[i]);
cout << c[i];
++i;
}
}

int main (int argc, const char * argv[])
{
char input[50];

cout << "Enter a string: ";
cin.getline(input, 50);

cout << "nnAfter a call to Upper: ";
upper(input);

cout << "nnAfter a call to Lower: ";
lower(input);

cout << "nnAfter a call to Reverse: ";
reverse(input);

cin.sync();
cin.get(); //To pause the program

//cout << "here";
return 0;
}