C Program to Add Two Complex Numbers by Passing Structure to a Function

In the following example of a C program that adds two complex numbers by passing a structure to a function :

Program :

#include <stdio.h>

struct complex {
    float real;
    float imag;
};

struct complex add(struct complex c1, struct complex c2);

int main() {
    struct complex num1, num2, result;

    printf("Enter first complex number:\n");
    printf("Real part: ");
    scanf("%f", &num1.real);
    printf("Imaginary part: ");
    scanf("%f", &num1.imag);

    printf("\nEnter second complex number:\n");
    printf("Real part: ");
    scanf("%f", &num2.real);
    printf("Imaginary part: ");
    scanf("%f", &num2.imag);

    result = add(num1, num2);

    printf("\nSum = %.1f + %.1fi\n", result.real, result.imag);

    return 0;
}

struct complex add(struct complex c1, struct complex c2) {
    struct complex temp;

    temp.real = c1.real + c2.real;
    temp.imag = c1.imag + c2.imag;

    return temp;
}

Output :

Enter first complex number:
Real part: 3.6
Imaginary part: 4.7
Enter second complex number:
Real part: 2.9
Imaginary part: 6.4
Sum = 6.5 + 11.1i

* In the program defines a structure complex that contains two members : real and imag. The program also defines a function add that takes two complex structures as arguments, performs the addition of the two complex numbers, and returns a complex structure containing the sum.

* The program then creates three instances of the complex structure called num1, num2, and result, initializes num1 and num2 with input values from the user using the scanf function, calls the add function to add num1 and num2 and store the result in result, and prints the sum of the complex numbers using the printf function.