**Complex numbers definition**

Complex numbers are two dimensional numbers i.e. it consists real part and imaginary part.

Complex numbers are written as a
+ ib

Where a and b are real numbers
and i

^{2}= -1Code 1:

1.

**How to use complex numbers in c**
2.

**C language complex numbers**
#include<stdio.h>

int main(){

int a,b;

printf("Enter
any complex number in the format a+ib: ");

scanf("%d+i%d",&a,&b);

printf("Real
part is: %d",a );

printf("\nImaginary
part is: %d",b);

return 0;

}

Code 2:

1.

**C program to printf complex numbers**#include<stdio.h>

int main(){

int a,b;

printf("Enter
the real part of complex number: ");

scanf("%d",&a);

printf("Enter
the imaginary part of complex number: ");

scanf("%d",&b);

printf("\nComplex
number is: %d%+di",a,b );

return 0;

}

**Operation on complex numbers:**

Addition of complex number

(a + ib) + (c + id) = (a+c) +
i(b+d)

Subtraction of complex numbers

(a + ib) -(c + id) = (a+c) +
i(b-d)

Multiplication of complex numbers

(a + ib) *(c + id) = (ac-bd) +
i(bc+ad)

Divison of complex numbers

(a + ib) / c + id) = ((ac + bd) + i(bc-ad))/(c^{2}+ d

^{2})

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