Oct 12, 2011

C Program to perform complex numbers operations using structure.

C Program to perform complex numbers operations using structure. Complex numbers are numbers which contains two parts, real part and imaginary part. Complex numbers are written as a+ib, a is the real part and b is the imaginary part. We used the structure in C to define the real part and imaginary part of the complex number.
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#include<stdio.h>
#include<math.h>

void arithmetic(int opern);

struct comp
{
 double realpart;
 double imgpart;
};

void main()
{
 int opern;
 clrscr();
 printf("\n\n \t\t\t***** MAIN MENU *****");
 printf("\n\n Select your option: \n 1 : ADD\n 2 : MULTIPLY\n 0 : EXIT \n\n\t\t Enter your Option [  ]\b\b");

 scanf("%d",&opern);

 switch(opern)
 {
 case 0:
  exit(0);
 case 1:
 case 2:
  arithmetic(opern);
 default:
  main();
 }

}

void arithmetic(int opern)
{

 struct comp w1, w2, w;

 printf("\n Enter two Complex Numbers  (x+iy):\n Real Part of First Number:");
 scanf("%lf",&w1.realpart);
 printf("\n Imaginary Part of First Number:");
 scanf("%lf",&w1.imgpart);
 printf("\n Real Part of Second Number:");
 scanf("%lf",&w2.realpart);
 printf("\n Imaginary Part of Second Number:");
 scanf("%lf",&w2.imgpart);


 switch(opern)
 {

 /*addition of complex number*/
 case 1:
  w.realpart = w1.realpart+w2.realpart;
  w.imgpart = w1.imgpart+w2.imgpart;
  break;

  /*multiplication of complex number*/
 case 2:
  w.realpart=(w1.realpart*w2.realpart)-(w1.imgpart*w2.imgpart);
  w.imgpart=(w1.realpart*w2.imgpart)+(w1.imgpart*w2.realpart);
  break;
 }


 if (w.imgpart>0)
  printf("\n Answer = %lf+%lfi",w.realpart,w.imgpart);
 else
  printf("\n Answer = %lf%lfi",w.realpart,w.imgpart);
 getch();
 main();
}
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