Лабораторная работа по программированию (C)

 #include 

double double_parse(const char* prompt) { 
    double value; 
    printf("%s", prompt); 
    scanf("%lf", &value); 
    while (getchar() != '\n') {;} 
    return value; 
} 

double f(double x, double a, double b, double c) { 
    if (x < 0 && b != 0) return a * x * x - b; 
    if (x > 0 && b == 0) return (x - a) / (x - b); 
    return x / c; 
} 

int main(void) { 
    double a = double_parse("a: "); 
    double b = double_parse("b: "); 
    double c = double_parse("c: "); 
    double xn = double_parse("Xнач: "); 
    double xk = double_parse("Xконеч: "); 
    double dx = double_parse("dx: "); 
    double end = xk + dx / 10.0; 
    double x = xn; 
    while (x < end) { 
        printf("%5.2lf %12.4lf\n", x, f(x, a, b, c)); 
        x += dx; 
    } 
    return 0; 
}