Question

Write a calculator program using a switch statement that: a) Prompts the user to enter two numbers b) Prompts the user to select between the four arithmetic operations using a choice from 1-4; for example, prompt the user with: "Choose 1) for add, 2) for subtract, 3) for multiply or 4) for divide)" c) Calculates the result of performing the selected operation on the numbers; and d) Displays the answer on the screen. (15 pts)

Answer 1

Answer:

Following are the code in C language

#include <stdio.h> // header file

int main() // main method

{

   float f1; // variable declarartion

   float x,y; //variable declarartion

   int option;//variable declarations

   printf("Enter Two numbers:");

   scanf("%f%f",&x,&y);// input two number

   printf("Choose : 1: For add 2: For Subtract 3: for multiply 4: for divide");

   scanf("%d",&option); //read the choice

   switch(option)

   {

       case 1: //  for addition

   printf("%4f",x+y);

          break;

          case 2:// for subtraction

   printf("%4f",x-y);

          break;

          case 3: //for multiply

      printf("%4f",x*y);

          break;

      case 4: // for division

      f1=x/y;

   printf("%4f",f1);

          break;

      default: ////for invalid choice

          printf("Invalid choice") ;

  }

return 0;

}

Explanation:

In this program we taking a two input from user of float types after taking input,the switch statement is used case 1 for addition,case 2 for subtraction case 3 for multiplication,case 4 for division and default for invalid choice .

Output

Enter Two numbers:2.5

2.5

Choose : 1: For add 2: For Subtract 3: for multiply 4: for divide:4

1.000000