A-Q2.c

#include <stdio.h>

struct complex
{
    float real;
    float imaginary;
};

void input(struct complex*);
void display(struct complex); 
struct complex product(struct complex, struct complex);

int main()
{
    struct complex c1, c2, c3;
    printf("\nFor Complex Number 1:");
    input(&c1);
    printf("\nFor Complex Number 2:");
    input(&c2);
    printf("\n\nComplex number 1 is ");
    display(c1);
    printf("\nComplex number 2 is ");
    display(c2); 
    c3 = product(c1, c2);
    printf("\nTheir Product = ");
    display(c3);
    return 0;
} 

void input(struct complex *t)
{
    printf("\nEnter value of\n");
    printf("real part : ");
    scanf("%f", &t->real);
    printf("imaginary part : ");
    scanf("%f", &t->imaginary);
} 

void display(struct complex c)
{
    printf("\n%0.2f + %0.2f i", c.real, c.imaginary);
}

struct complex product(struct complex t1, struct complex t2)
{
    struct complex t;
    t.real = t1.real * t2.real - t1.imaginary * t2.imaginary;
    t.imaginary = t1.real * t2.imaginary + t1.imaginary * t2.real;
    return t;
}