/*
 ============================================================================
 Name        :  Command Line Calculator
 Author      :  Nikolai Benedikt
 Version     :  1.0
 Copyright   :
 Description :  Command Line Calculator
 ============================================================================
 */
#include <stdio.h>
#include <stdlib.h>

//Helper function for adding
int add(int a, int b){return a+b;}
//Helper function for subtracting
int subtract(int a, int b){return a-b;}
//Helper function for multiplying
int multiply(int a, int b){return a*b;}
//Helper function for dividing
int divide(int a, int b){return a/b;}


int main(int argc,char **argv)
{
    //Create Variables
    int n1,n2, sol;
    char op;

    //If argument counter != 4 --> wrong format // return exit-failure
    if(argc != 4){
        printf("Bitte im Format [x]_+_[y] eingeben! (Nicht x+y)\n");
        return EXIT_FAILURE;
    }
        //Initialization of variables
        n1= atoi(argv[1]);
        n2= atoi(argv[3]);
        op= argv[2][0];


        switch(op){
        case '+':       printf("%d + %d  = %d \n",n1,n2,add(n1,n2));
                            break;
        case '*':       printf("%d * %d  = %d \n",n1,n2,multiply(n1,n2));
                            break;
        case '-':       printf("%d - %d  = %d \n",n1,n2,subtract(n1,n2));
                            break;
        case '/':       printf("%d / %d  = %d \n",n1,n2,divide(n1,n2));
                            break;

        default:        printf("Unbekannter Operant...\n");
                        return EXIT_FAILURE;
        }

    return EXIT_SUCCESS;
}