Simple algebraic addition does not work in the case of Complex Number. Because they have two parts, Real and Imaginary. To add two complex numbers, a real part of one number must be added with a real part of other and imaginary part one must be added with an imaginary part of other. The concept of complex number can be viewed as a structure having two members

*real*and*imaginary*. So to add two complex numbers we use structure addition. If complex1 and complex2 be two structure variables and*complex3*be their sum thenIn this way, we can add two complex numbers. The source code and output of the program is given here…complex3.real = complex1.real + complex2.real; complex3.imag = complex1.imag + complex2.imag;

**Source Code:**

#include<stdio.h> struct comp{ float real; float imag; }; struct comp comp1,comp2; struct comp sum_complex(struct comp complex1,struct comp complex2){ struct comp temp; temp.real = complex1.real + complex2.real; temp.imag = complex1.imag + complex2.imag; return temp; } int main(){ struct comp result; printf("Enter Complex Number 1: "); scanf("%f%f",&comp1.real, &comp1.imag); printf("Enter Complex Number 2: "); scanf("%f%f",&comp2.real,&comp2.imag); result = sum_complex(comp1,comp2); printf("The sum is %.2f + i%.2f\n\n", result.real,result.imag); return 0; }

**Output**

I am here to discuss about a number which can be put in the form a + bi termed as complex number, where a and b are real numbers and i is called the imaginary unit,in given expression "a" is the real part and b is the imaginary part of the complex number. The complex number can be identified with the point (a, b).

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