פתרון תרגיל 3 שאלה 1

// Q1
void mathStringCalc(const char mathString[])
{
    int j = 0, i = 0, num = 0, k = 0;
    int numbers[101];
    double result = 0;
    char operation[101];

    for (j = 0; mathString[j] != '\0';j = i+3, ++k, num = 0) {
        for (i = j; mathString[i] != ' ' && mathString[i] != '\0'; i++) {
                num = num * 10 + (mathString[i] - '0');
        }
        numbers[k] = num;
        operation[k] = mathString[i + 1];
    }
    result = numbers[0];
    for (int tmp = 0;operation[tmp] != '\0' ;tmp++) {
        switch (operation[tmp]) {
        case '+':
            result = result + numbers[tmp+1];
            break;

        case '-':
            result = result - numbers[tmp + 1];
            break;

        case '*':
            result = result * numbers[tmp + 1];
            break;

        case '/':
            result = result / numbers[tmp + 1];
            break;
        default:
            break;
        }
    }

    printf("%s = %.3lf\n", mathString, result);
}