CA Programming Lab1: at RUPP

The Quadratic Formula V1.c

//  កម្មវិធីដោះស្រាយ​ សមីការដឺក្រេទី​២.c
//  written by By Kalim

#include <stdio.h>
#include <math.h>

int main(){

    float Delta=0;
    float a=0;
    float b=0;
    float c=0;
    float d=0;
    float x[2];
    char choice;
    printf("+-------------------------------------------------------+\n");
    printf("|         Math Solver:  The Quadratic Formula           |\n");
    printf("|                 ax^2  + bx + c = d                    |\n");
    printf("+-------------------------------------------------------+\n");
    printf("|             1. Set Value for a ,b ,c ,d               |\n");
    printf("+-------------------------------------------------------+\n");
    printf("                 a = ");
    scanf("%f",&a);
    printf("                 b = ");
    scanf("%f",&b);
    printf("                 c = ");
    scanf("%f",&c);
    printf("                 d = ");
    scanf("%f",&d);
    printf("            ==> %-.2f x^2 %+-.2fx %+-.2f = %+-.2f\n",a,b,c,d);
    Delta = pow(b,2)-4*a*(c-d);

    if (Delta<0) {
        x[0] = ((-1)*b)/(2*a);
        x[1] = ((-1)*b)/(2*a);
        printf("+-------------------------------------------------------+\n");
        printf("|             2. Result Δ < 0                           |\n");
        printf("+-------------------------------------------------------+\n");
        printf("                 Δ = %.2f * i^2\n",Delta);
        Delta = -Delta;
        printf("                 x[1] = %.2f %.2fi\n",x[0],sqrt(Delta));
        printf("                 x[2] = %.2f %.2fi\n",x[1],-sqrt(Delta));
    }
    else if(Delta==0)    {
        x[0] = ((-1)*b)/(2*a);
        printf("+-------------------------------------------------------+\n");
        printf("|             2. Result Δ = 0                           |\n");
        printf("+-------------------------------------------------------+\n");
        printf("                 Δ = %.2f\n",Delta);
        printf("                 x[1] = x[2] = %.2f\n",x[0]);
    }
    else
    {
        x[0] = ((-1)*b+sqrt(Delta))/(2*a);
        x[1] = ((-1)*b-sqrt(Delta))/(2*a);
        printf("+-------------------------------------------------------+\n");
        printf("|             2. Result Δ > 0                           |\n");
        printf("+-------------------------------------------------------+\n");
        printf("                 Δ = %.2f\n",Delta);
        printf("                 x[1] = %.2f\n",x[0]);
        printf("                 x[2] = %.2f\n",x[1]);
      }
  return 0;
}