I just made my first application!

[DoerrFan]

Hey guys i just made my first application, its a calculator that runs in terminal, it adds, subtracts multiplies, and divides, it isn't much, but im excited!
Its in C, for some reason Objective -C doesn't look like a good starting point to learn development.
One question though, after i enter 6 + 6 or something, it logs out after, what command would i use to restart it?

Thanks, just had to share

[drunix]

Cool, I would like to see your code... possible?

I am triying to learn ... wanna help me?

[DoerrFan]

Originally Posted by drunix

Cool, I would like to see your code... possible?

I am triying to learn ... wanna help me?

Sure, here:
Calculate.c
/*
* Calculate.c
* Calculator
*
* Created by Jon Makkinje on 3/21/08.
* Copyright 2008 All rights reserved.
*
*/

#include "Calculate.h"

#include <stdio.h>
#include <stdlib.h>

int calculate(int a, int b, char operator)
{
int result;

switch (operator) {
case '+':
result = a + b;
break;
case '-':
result = a - b;
break;
case '*':
result = a * b;
break;
case '/':
result = a / b;
break;
default:
printf("Unknown operator: %c/n", operator);

}

return result;
}

Calculate.h
int calculate(int a, int b, char operator);

main.c
#include <stdio.h>
#include <stdlib.h>

#include "Calculate.h"

int main (int argc, const char * argv[])
{
int a, b, count, answer;
char op;

// print the prompt
printf("Enter an expression; ");

// get the expression
count = scanf("%d %c %d", &a, &op, &b);
if (count!=3) {
printf("Bad expression\n");
return 1;

}

// perform the computation
answer = calculate(a, b, op);

// print the answer
printf("%d %c %d = %d\n", a, op, b, answer);

return 0;
}

[TheHK]

wow that's great news ! I'm actually happy for you lol

here's to more complex apps in the future..

[DoerrFan]

Originally Posted by TheHK

wow that's great news ! I'm actually happy for you lol

here's to more complex apps in the future..

Yeah, im hoping to make iPhone apps xD

[Kev1000000]

I see you are using C++ instead of Obj-C. I know C++ really well, but I want to start learning Obj-C...

[heath_rox]

congratulations

[DoerrFan]

Originally Posted by Kev1000000

I see you are using C++ instead of Obj-C. I know C++ really well, but I want to start learning Obj-C...

Yeah i want to to, but it doesn't seem like a good starting point for some reason for a first time developer, i want to learn C then Objective C, just need to learn about OOP.

[pingwhen]

::bows down:: nice your on the path i sure would like to fallow. im stucking waiting till i grad. form HS, and get a pretty macbook pro

[NetMage]

1. You can compile this with the Windows toolchain and run it on a jailbroken phone.

2. You don't need to restart, you want to do what is called a Read-Eval-Print loop, which means you need an exit command (or let an error do exit) and put the scan in a loop:

while (1) {
puts("Enter an expression: ");

count = scanf("%d %c %d", &a, &op, &b);
if (count != 3) {
puts("Bad expression\n");
return 1;
}

answer = calculate(a, b, op);

printf("%d %c %d = %d\n", a, op, b, answer);
}

(Personal preference - don't comment the obvious.)

[screamo]

dang that looks confusing, good work though, your making progress!

[DoerrFan]

Originally Posted by NetMage

1. You can compile this with the Windows toolchain and run it on a jailbroken phone.

2. You don't need to restart, you want to do what is called a Read-Eval-Print loop, which means you need an exit command (or let an error do exit) and put the scan in a loop:

while (1) {
puts("Enter an expression: ");

count = scanf("%d %c %d", &a, &op, &b);
if (count != 3) {
puts("Bad expressionn");
return 1;
}

answer = calculate(a, b, op);

printf("%d %c %d = %dn", a, op, b, answer);
}

(Personal preference - don't comment the obvious.)

Thanks!