Compute Quadratic Equation

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 //Program to Compute Quadratic Equations  
 //Downloaded from www.c4cprog.co.nr  
 #include<conio.h>  
 #include<math.h>  
 void main()  
 {  
 int a,b,c,d;  
 float r1,r2;  
 clrscr();  
 printf("\nEnter the Values of the coefficients a,b,c : \n");  
 scanf("%d%d%d",&a,&b,&c);  
 d=(b*b)-(4*a*c);  
 if(d==0)  
      {  
      printf("\nThe Roots are REAL & EQUAL\nRoots Are : \n");  
      r1=(-b)/(2.0*a);  
      r2=r1;  
      printf("1)%f 2)%f",r1,r2);  
      }  
 else  
 {  
      if(d>0)  
      {  
      printf("\nThe Roots are REAL & DISTINCT\nRoots are : \n");  
      r1=((-b)+sqrt(d))/(2.0*a);  
      r2=((-b)-sqrt(d))/(2.0*a);  
      printf("1)%f 2)%f",r1,r2);  
      }  
      else  
      {  
      printf("\nThe Roots are IMAGINARY\nRoots Are : \n");  
      d=-d;  
      r1=(-b)/(2.0*a);  
      r2=(sqrt(d))/(2.0*a);  
      printf("1)%f+i%f",r1,r2);  
      printf("2)\n%f-i%f",r1,r2);  
      }  
 }  
 getch();  
 }  
 /*  
 Enter the Values of the coefficients a,b,c :  
 1  
 -4  
 4  
 The Roots are REAL & EQUAL  
 Roots Are :  
 1)2.000000 2)2.000000  
 */