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

// C Program to Add Two Complex Numbers by Passing Structure to a Function
#include <stdio.h>

// Make structure of the complex number
typedef struct complex_number {
    float real_num;
    float imaginary_num;
} complex_number;

// Custom function to sum the complex numbers
complex_number sum_complex(complex_number num1, complex_number num2) {
    complex_number temp_num;
    temp_num.real_num = num1.real_num + num2.real_num;
    temp_num.imaginary_num = num1.imaginary_num + num2.imaginary_num;
    return (temp_num);
}

// It's the main function of the program
int main() {
    // declare the variables here
    complex_number num1, num2, result;
    
    // Step-1 INPUT of the 1st Complex
    printf("Enter the real & imaginary numbers of 1st Complex:\n");
    scanf("%f %f", &num1.real_num, &num1.imaginary_num);

    // Step-2 INPUT of the 2nd Complex
    printf("\nEnter the real & imaginary numbers of 2nd Complex:\n");
    scanf("%f %f", &num2.real_num, &num2.imaginary_num);

    // Step-3 Call the function to add the Complex
    result = sum_complex(num1, num2);

    // Step-4 Final output of the program
    printf("\nSum = %.1f + %.1fi\n", result.real_num, result.imaginary_num);
    return 0;
}