/*nhap 2 so va mot ki hieu toan*/

#include<stdio.h>

#include<conio.h>

#include<string>

#include<math.h>

int main()

{

    char i;

    float a,b;

    printf("nhap 2 so a,b:");scanf("%f%f",&a,&b);

    do

    {

    fflush(stdin);

    printf("nhap phep toan:");scanf("%c",&i);

    }while((i!='+')&&(i!='-')&&(i!='*')&&(i!='/'));

    if(i=='+')

        printf("%.2f+%.2f=%.2f",a,b,a+b);

    if(i=='-')

        printf("%.2f-%.2f=%.2f",a,b,a-b);

    if(i=='*')

        printf("%.2f*%.2f=%.3f",a,b,a*b);

    if(i=='/')

        printf("%.2f/%.2f=%.2f",a,b,a/b);

    getch();

    return 0;

}