Q:

I am new to those stuff i have to do a quadratic equation for school

I have to make a quadratic equation in Microsoft Visual Studio. 
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
    float a, b, c, D, x1, x2;
    printf("Type in a :\n");
    scanf_s("%d", &a);
    if (a == 0)
    {
        printf("The equation is not quadratic");
    }
    else
    {
        printf("Type in b:\n");
        scanf_s("%d", &b);
        printf("Type in c:\n");
        scanf_s("%d", &c);
        D = b*b - 4 * a*c;
        if (D < 0)
        {
            printf("There are no real roots");
        }
        else if (D == 0)
        {
            x1 = x2 = -b / (2 * a);
        }
        else
        {
            x1 = (-b + powf(D, 0.5)) / (2 * a);
            x2 = (-b - powf(D, 0.5)) / (2 * a);
        }
    }
    system("pause");
    return 0;
}

This is what I have done till now. Can you tell me where is my mistake? The studio isn't finding any mistakes, but there is a problem - after starting the program I type in a, b, and c and after that it says : "Press any key to continue" and when I do the console window disappears. Pls help

A:

You are not printing the answer . . . for each case (real roots or not) you need to add a printf to print the calculated values of x1 and x2.
The line "pause" is the line that causes the "Press any key to continue . . . " so your program is reaching that point without error.

