Tharindu Chandima

/*Exercise 4.5 simple calculater*/
#include<stdio.h>
int main()
{
  float num1,num2,num3;
  int pre;
  printf("Enter number 1: ");
  scanf("%f",&num1);
  printf("Enter number 2: ");
  scanf("%f",&num2);
  printf("\tMathematical Oparation\n");
  printf("-----------------------------------------\n");
  printf("1 - Add\n");
  printf("2 - Subatract\n");
  printf("3 - Multiply\n");
  printf("4 - Divide\n");
  printf("-----------------------------------------\n");
  printf("Enter your preference: ");
  scanf("%d",&pre);
 switch(pre)
  {
    case 1:
      num3=num1+num2;
      printf("Answer: %.2f\n",num3);
      break;
    case 2:
      num3=num1-num2;
      printf("Answer: %.2f\n",num3);
      break;
    case 3:
      num3=num1*num2;
      printf("Answer: %.2f\n",num3);
      break;
    case 4:
      num3=num1/num2;
      printf("Answer: %.2f\n",num3);
      break;
    default:
      printf("Invalid Oparation!!\n");
  }
  fflush(stdin);
  getchar();
return 0;
}