C Program – Add Two Complex Numbers - Struct & Separate Parts

Add Complex Numbers Using a Struct

#include <stdio.h>
typedef struct {
    float real;
    float imag;
} Complex;
int main() {
    Complex a, b, sum;
    printf("Enter real and imaginary parts of first complex number: ");
    scanf("%f %f", &a.real, &a.imag);
    printf("Enter real and imaginary parts of second complex number: ");
    scanf("%f %f", &b.real, &b.imag);
    sum.real = a.real + b.real;
    sum.imag = a.imag + b.imag;
    printf("Sum = %.1f + %.1fi\n", sum.real, sum.imag);
    return 0;
}

Enter real and imaginary parts of first complex number: 3 2
Enter real and imaginary parts of second complex number: 1 7
Sum = 4.0 + 9.0i
        

Practice: Complex Struct

This approach defines a struct to group the real and imaginary parts together. After reading both complex numbers, their respective parts are added and printed in standard form.

Add Complex Numbers Using Separate Variables

#include <stdio.h>
int main() {
    float real1, imag1, real2, imag2, realSum, imagSum;
    printf("Enter real and imaginary parts of first complex number: ");
    scanf("%f %f", &real1, &imag1);
    printf("Enter real and imaginary parts of second complex number: ");
    scanf("%f %f", &real2, &imag2);
    realSum = real1 + real2;
    imagSum = imag1 + imag2;
    printf("Sum = %.1f + %.1fi\n", realSum, imagSum);
    return 0;
}

Enter real and imaginary parts of first complex number: 2 5
Enter real and imaginary parts of second complex number: 4 3
Sum = 6.0 + 8.0i
        

Practice: Separate Parts

Instead of using a structure, this method handles each part individually. It works by storing and adding real parts separately from imaginary parts before displaying the combined result.