Write an algorithm and translate it to a C program for a calculator that perform

Question

Write an algorithm and translate it to a C program for a calculator that performs three (3) operations on 1-byte numbers: addition, subtraction, and multiplication. The type of operation performed depends on the input op_code as follows if op_code = 1 the calculator performs addition of the two 1-byte numbers and store the result in Sum if op_code = 2 the calculator performs subtraction of the two 1-byte numbers and store the result in Difference if op_code = 3 the calculator performs multiplication of the two 1-byte numbers and store the result in the PRODH and PRODL if op_code is not equal to any of these values the system outputs Error = 1

Explanation / Answer

Code:-

#include <stdio.h>

int main(void) {
   short int x,y,result;
   short int mul_result=0;
    short int PRODH=0;
   int PRODL=0;
   printf("Enter two 1-byte number one by one ");
   scanf("%hhd",&x);
   scanf("%hhd",&y);
   printf("Enter op-code for performing operation :- 1 for addition 2 for subtraction 3 for multiplication");
   int op_code;
   scanf("%d",&op_code);
   switch(op_code){
        case 1:
        result=x+y;
        printf("The result of addition is %hhd",result);
        break;
        case 2:
        result=x-y;
        printf("The result of subtraction is %hhd",result);
        break;
        case 3:
        mul_result=x*y;
        PRODL=mul_result<<8;
        PRODL=PRODL>>8;
        if(mul_result<255)
            PRODH=0;
        else{
            PRODH=PRODL>>8;
        }
        printf("The result of multiplication :- HIGHER BYTE = %hhd LOWER BYTE = %hhd",PRODH,PRODL);
        break;
        default:
        printf("ERROR 1 ");
   }
   return 0;
}

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