/*
 * funcrw1.c
 */
#include <stdio.h>
#include <ctype.h>

void makeupper(void); // function prototype

int main(void) // header for main function
{
  printf("Please enter a line of text using ");
  printf("both upper and lower case letters.\n");
  
  makeupper(); // call the function makeupper
  
  printf("End of program.\n");
  
  return 3;
}

void makeupper(void) // function header and definition: takes nothing, returns nothing
{
  char cc; // declare char 
  
  while( (cc=getchar()) != '\n' ) // get a char from stdin
                                  // assign value to memory location of cc
                                  // if not newline, do block
  {
    if (islower(cc) ) // true if cc is lowercase
    {
      putchar(cc-32); // subtract 32 form value of cc
                      // put the ascii value of result
    }                    
    else
    {
      putchar(cc); // print the ascii value of cc
    }
  }
  putchar('\n'); // print a new line
}