WAP in C to convert a string from Lower case to Upper case using standard library functions

//WAP in C to convert a string from Lower case to Upper case

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

void main()
{

       char string[50];
       int count=0, ch, i;

      clrscr(); // for clearing the console screen

      printf("Enter a string\n");
      gets(string); //input string

      for(i=0;string[i]!='\0';i++)
      {
         count++;  //count the number of characters in the string or use strlen()
       }

      printf("The entered string is : %s",string); //printing the entered string

      printf("\nUpperCase string is: ");

// logic for converting the string in uppercase 
      for(i=0; i < count; i++)
      {
          ch = toupper(string[i]); //changing lower case character to upper case
          printf("%c",ch);
      }

       getch(); // holding the console screen
} // End of main()