#include <stdio.h>

typedef struct {
    float real;
    float imag;
} Complex;

// Function prototypes
Complex readComplex();
void printComplex(Complex c);
Complex addComplex(Complex a, Complex b);
Complex subComplex(Complex a, Complex b);
Complex mulComplex(Complex a, Complex b);

int main() {
    Complex num1, num2, sum, diff, prod;

    printf("Enter first complex number:\n");
    num1 = readComplex();

    printf("Enter second complex number:\n");
    num2 = readComplex();

    // Perform operations
    sum = addComplex(num1, num2);
    diff = subComplex(num1, num2);
    prod = mulComplex(num1, num2);

    // Display results
    printf("\nResults:\n");
    printf("First number: ");
    printComplex(num1);
    printf("Second number: ");
    printComplex(num2);

    printf("Sum: ");
    printComplex(sum);

    printf("Difference: ");
    printComplex(diff);

    printf("Product: ");
    printComplex(prod);

    return 0;
}

// Function to read a complex number
Complex readComplex() {
    Complex c;
    printf("  Enter real part: ");
    scanf("%f", &c.real);
    printf("  Enter imaginary part: ");
    scanf("%f", &c.imag);
    return c;
}

// Function to print a complex number
void printComplex(Complex c) {
    if (c.imag >= 0)
        printf("%.2f + %.2fi\n", c.real, c.imag);
    else
        printf("%.2f - %.2fi\n", c.real, -c.imag);
}

// Function to add two complex numbers
Complex addComplex(Complex a, Complex b) {
    Complex result;
    result.real = a.real + b.real;
    result.imag = a.imag + b.imag;
    return result;
}

// Function to subtract two complex numbers
Complex subComplex(Complex a, Complex b) {
    Complex result;
    result.real = a.real - b.real;
    result.imag = a.imag - b.imag;
    return result;
}

// Function to multiply two complex numbers
Complex mulComplex(Complex a, Complex b) {
    Complex result;
    result.real = a.real * b.real - a.imag * b.imag;
    result.imag = a.real * b.imag + a.imag * b.real;
    return result;
}