#include <stdio.h>

int char_lower(int c)
{
  if ((c >= 'A') && (c <= 'Z'))
    c = c + 'a' - 'A';
  return(c);
}

void string_lower(char s[])
{
  int n;
  n = 0;
  while (s[n] != 0)
  {
    s[n] = char_lower(s[n]);
    n++;
  }
}


void main(void)
{
  char s[100];
  int n;

  printf("Welcome to LOWER.\n");
  printf("Please enter a string:\n");

  n = 0;
  while (s[n-1] != '\n')
  {
    s[n] = getchar();
    n++;
  }

  string_lower(s);
  printf("Here is the converted string:\n");
  printf(s);
}