Here is a simple C program that uses structures and functions to perform addition and multiplication of two complex numbers. ```c #include // Define the structure for complex number typedef struct complex { float real; float imag; } complex; // Function to read complex number complex readC() { complex c; printf("Enter real and imaginary parts: "); scanf("%f %f", &c.real, &c.imag); return c; } // Function to display complex number void display(complex c) { printf("%.1f + %.1fi ", c.real, c.imag); } // Function to add two complex numbers complex add(complex n1, complex n2) { complex temp; temp.real = n1.real + n2.real; temp.imag = n1.imag + n2.imag; return temp; } // Function to multiply two complex numbers complex product(complex n1, complex n2) { complex temp; temp.real = n1.real*n2.real - n1.imag*n2.imag; temp.imag = n1.imag*n2.real + n1.real*n2.imag; return temp; } int main() { complex n1, n2, result; printf("Enter first complex number: "); n1 = readC(); printf("Enter second complex number: "); n2 = readC(); result = add(n1, n2); printf("The addition of two complex numbers is: "); display(result); result = product(n1, n2); printf("The multiplication of two complex numbers is: "); display(result); return 0; } ``` This program first reads two complex numbers using the `readC()` function. Then it adds and multiplies them using the `add()` and `product()` functions respectively. The results are then displayed using the `display()` function.

Question

Here is a simple C program that uses structures and functions to perform addition and multiplication of two complex numbers.

```c
#include<stdio.h>

// Define the structure for complex number
typedef struct complex {
    float real;
    float imag;
} complex;

// Function to read complex number
complex readC() {
    complex c;
    printf("Enter real and imaginary parts: ");
    scanf("%f %f", &c.real, &c.imag);
    return c;
}

// Function to display complex number
void display(complex c) {
    printf("%.1f + %.1fi
", c.real, c.imag);
}

// Function to add two complex numbers
complex add(complex n1, complex n2) {
    complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return temp;
}

// Function to multiply two complex numbers
complex product(complex n1, complex n2) {
    complex temp;
    temp.real = n1.real*n2.real - n1.imag*n2.imag;
    temp.imag = n1.imag*n2.real + n1.real*n2.imag;
    return temp;
}

int main() {
    complex n1, n2, result;

printf("Enter first complex number:
");
    n1 = readC();

printf("Enter second complex number:
");
    n2 = readC();

result = add(n1, n2);
    printf("The addition of two complex numbers is: ");
    display(result);

result = product(n1, n2);
    printf("The multiplication of two complex numbers is: ");
    display(result);

return 0;
}
```

This program first reads two complex numbers using the `readC()` function. Then it adds and multiplies them using the `add()` and `product()` functions respectively. The results are then displayed using the `display()` function.

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