Check Answer

#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#include<ctype.h>

int main()
{
 char ch;
 cout<<"Enter any character :";
 ch=getchar();
 ch=toupper(ch);
 cout<<ch;
 getch();
 return 0;
}

Output:

Enter any character : d
D