Question

in C programing language

Two numbers entered from the command line (example: calculate.exe 2 + 2)
Add, subtract, divide and multiply by (+, -, /, *) operators
Write the C program that makes the calculation using switch-case.
hint: operator [2][0] comes from index .

Answer 1

Note: here expression stores in argv[1] not argv[2] for my compiler

Source Code:

#include <stdio.h>

int main(int argc, char const *argv[])
{
   int operand1,operand2,operator;
   operand1=argv[1][0]-'0';
   operand2=argv[1][2]-'0';
   operator=argv[1][1];

   int result=0;
   switch(operator)
   {
       case '+':
           result=operand1+operand2;
           break;
       case '-':
           result=operand1-operand2;
           break;
       case '*':
           result=operand1*operand2;
           break;
       case '/':
           result=operand1/operand2;
           break;
   }
   printf("Result of %s is %d\n",argv[1],result);
}

Sample input and output: