ตัวอย่างคำสั่ง loop do_while

โปรแแกรมเมนู คำนวณตัวเลข 2 ชุด
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//menu01
#include"stdio.h"
#include"conio.h"
#include"ctype.h"
main()
{
float a,b,c,d;
int x;
bool T=true;
do{
printf("\n Calculate Number....\n");
printf("---------------------\n");
printf("  1. Plus...  \n");
printf("  2. Minus...  \n");
printf("  3. Multiply...  \n");
printf("  4. Divide...  \n");
printf("---------------------\n");
printf("  5. eXit...  :");
scanf("%d",&x);
switch(x)
{
case 1 : printf("\n Input number1:");scanf("%f",&a);
printf(" Input number2:");scanf("%f",&b);
printf(" %.2f + %.2f = %.2f",a,b,a+b);
break;
case 2 : printf("\n Input number1:");scanf("%f",&a);
printf(" Input number2:");scanf("%f",&b);
printf(" %.2f - %.2f = %.2f",a,b,a-b);
break;
case 3 : printf("\n Input number1:");scanf("%f",&a);
printf(" Input number2:");scanf("%f",&b);
printf(" %.2f x %.2f = %.2f",a,b,a*b);
break;
case 4 : printf("\n Input number1:");scanf("%f",&a);
printf(" Input number2:");scanf("%f",&b);
printf(" %.2f / %.2f = %.2f",a,b,a/b);
break;
case 5 : T=false;
}
}while(T);

printf("Bye bye....")

getch();
}