#include <stdio.h>
#include <stdlib.h>
struct complex
int real, img;
;
int main()
int choice, x, y, z;
struct complex a, b, c;
while(1)
printf("Press 1 to add two complex numbers.
");
printf("Press 2 to subtract two complex numbers.
");
printf("Press 3 to multiply two complex numbers.
");
printf("Press 4 to divide two complex numbers.
");
printf("Press 5 to exit.
");
printf("Enter your choice
");
scanf("0", &choice);
if (choice == 5)
exit(0);
if (choice >= 1 && choice <= 4)
printf("Enter a and b where a + ib is the first complex number.");
printf("
a = ");
scanf("0", &a.real);
printf("b = ");
scanf("0", &a.img);
printf("Enter c and d where c + id is the second complex number.");
printf("
c = ");
scanf("0", &b.real);
printf("d = ");
scanf("0", &b.img);
if (choice == 1)
c.real = a.real + b.real;
c.img = a.img + b.img;
if (c.img >= 0)
printf("Sum of the complex numbers = 0 + 0i", c.real, c.img);
else
printf("Sum of the complex numbers = 0 0i", 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 the complex numbers = 0 + 0i", c.real, c.img);
else
printf("Difference of the complex numbers = 0 0i", 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 the complex numbers = 0 + 0i", c.real, c.img);
else
printf("Multiplication of the complex numbers = 0 0i", c.real, c.img);
else if (choice == 4)
if (b.real == 0 && b.img == 0)
printf("Division by 0 + 0i isn't allowed.");
else
x = a.real*b.real + a.img*b.img;
y = a.img*b.real - a.real*b.img;
z = b.real*b.real + b.img*b.img;
if (x%z == 0 && y%z == 0)
if (y/z >= 0)
printf("Division of the complex numbers = 0 + 0i", x/z, y/z);
else
printf("Division of the complex numbers = 0 0i", x/z, y/z);
else if (x%z == 0 && y%z != 0)
if (y/z >= 0)
printf("Division of two complex numbers = 0 + 0/0i", x/z, y, z);
else
printf("Division of two complex numbers = 0 0/0i", x/z, y, z);
else if (x%z != 0 && y%z == 0)
if (y/z >= 0)
printf("Division of two complex numbers = 0/0 + 0i", x, z, y/z);
else
printf("Division of two complex numbers = 0 0/0i", x, z, y/z);
else
if (y/z >= 0)
printf("Division of two complex numbers = 0/0 + 0/0i",x, z, y, z);
else
printf("Division of two complex numbers = 0/0 0/0i", x, z, y, z);
else
printf("Invalid choice.");
printf("
Press any key to enter choice again...
");