text: #include <stdio.h>
  #include <string.h>
  
  int main()
  {
  	int n,i;char s[100];
  	puts("Enter message: ");
  	gets(s);n=strlen(s);
  	for (i=0;i<n;i++)
  	{
  		if (s[i]>='a'&&s[i]<='z') s[i]-=32;
  		switch (s[i])
  		{
  			case 'A':s[i]='4';break;
  			case 'B':s[i]='8';break;
  			case 'E':s[i]='3';break;
  			case 'I':s[i]='1';break;
  			case 'O':s[i]='0';break;
  			case 'S':s[i]='5';break;
  		}
  	}
  	printf("In B1FF-speak: ");
  	for (i=0;i<n;i++) putchar(s[i]);
  	for (i=0;i<10;i++) putchar('!');
  	putchar('\n');
  	return 0;
  }
  