calc.c

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#include <libcalc.h>
#include <console-util.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    console_init();
 
    if (argc != 4)
    {
        fprintf(stderr, "Usage: %s <arg1> <arg2> <arg3>\n", argv[0]);
        console_dispose();
        return 1;
    }
 
    if (argv[2][0] == 0x00 || argv[2][1] != 0x00)
    {
        fprintf(stderr, "Usage: %s <arg1> <arg2> <arg3>\n", argv[0]);
        console_dispose();
        return 1;
    }
 
    int arg1 = atoi(argv[1]);
    int arg3 = atoi(argv[3]);
    int result;
 
    int kind;
    switch (argv[2][0])
    {
    case '+':
        kind = CALC_KIND_ADD;
        break;
    case '-':
        kind = CALC_KIND_SUBTRACT;
        break;
    case 'x':
        kind = CALC_KIND_MULTIPLY;
        break;
    case '/':
        kind = CALC_KIND_DIVIDE;
        break;
    default:
        fprintf(stderr, "Usage: %s <num1> <+|-|x|/> <num2>\n", argv[0]);
        console_dispose();
        return 1;
        break;
    }
 
    if (calcHandler(kind, arg1, arg3, &result) != 0)
    {
        fprintf(stderr, "Error: calcHandler failed\n");
        console_dispose();
        return 1;
    }
 
    printf("%d\n", result);
 
    console_dispose();
    return 0;
}