C Program11

11. Addition and subtraction of complex numbers using structure.

 

include <stdio.h>

#include <stdlib.h>

 struct complex

{

int real, img;

};

 

int main()

{

int choice, temp1, temp2, temp3;

struct complex a, b, c;

 while(1)

  {

printf("Press 1 to add two complex numbers.\n");

printf("Press 2 to subtract two complex numbers.\n");

printf("Press 3 to exit.\n");

printf("Enter your choice\n");

scanf("%d",&choice);

 if( choice == 3)

exit(0);

 if(choice >= 1 && choice <= 4)

    {

printf("Enter a and b where a + ib is the first complex number.");

printf("\na = ");

scanf("%d", &a.real);

printf("b = ");

scanf("%d", &a.img);

printf("Enter c and d where c + id is the second complex number.");

printf("\nc = ");

scanf("%d", &b.real);

printf("d = ");

scanf("%d", &b.img);

    }

    if ( choice == 1 )

    {

c.real = a.real + b.real;

c.img = a.img + b.img;

       if ( c.img>= 0 )

printf("Sum of two complex numbers = %d + %di",c.real,c.img);

      else

printf("Sum of two complex numbers = %d %di",c.real,c.img);

    }

    else if ( choice == 2 )

    {

c.real = a.real - b.real;

c.img = a.img - b.img;

       if ( c.img>= 0 )

printf("Difference of two complex numbers = %d + %di",c.real,c.img);

      else

printf("Difference of two complex numbers = %d %di",c.real,c.img);

    }

    else if ( choice == 3 )

    {

c.real = a.real*b.real - a.img*b.img;

c.img = a.img*b.real + a.real*b.img;

     if ( c.img>= 0 )

printf("Multiplication of two complex numbers = %d + %di",c.real,c.img);

      else

printf("Multiplication of two complex numbers = %d %di",c.real,c.img);

    }

 else

printf("Invalid choice.");

 printf("\nPress any key to enter choice again...\n");

  }

}