/* t2_1.c ( PASCAL講座 sample program )
if 文、switch 文、goto 文

コンパイル命令は
gcc t2_1.c -o t2_1

実行命令は
t2_1
*/

#include<stdio.h>
#include<stdlib.h>

main()
{
  int a,b;
  char c;
    
the_label:
  a=rand()%3;		/* 0,1,2 の整数乱数を発生 */	
  b=rand()%3;
  printf("a = %1d\n",a);
  printf("b = %1d\n",b);
  if(a==b) printf("a  is equal to  b\n");
  else printf("a  is not equal to  b\n");	
  printf("\n");

  switch(a){
    case 0: printf("Hello.\n"); break;
    case 1: printf("How are you.\n"); break;
    case 2: printf("Nice to meet you.\n");
  }
  printf("\n");
  
  printf("----- Hit  0  to stop -----\n");
  c=getchar();
  if(c!='0') goto the_label;		
}