/*案例代碼文件名：AL4_2.C。*/
/*功能：說明if語句的格式和用法。*/
main()
{ int num1,num2,num3,temp;
  printf("Please input three numbers:");
  scanf("%d,%d,%d",&num1,&num2,&num3);
  if (num1>num2) {temp=num1;num1=num2;num2=temp;}
  if (num2>num3) {temp=num2;num2=num3;num3=temp;}
  if (num1>num2) {temp=num1;num1=num2;num2=temp;}
  printf("Three numbers after sorted: %d,%d,%d\n",num1,num2,num3);
}