C Program to Perform Complex Number Multiplication

This C program performs complex number multiplication. This program generally demonstrates the arithmatic operations on complex numbers.

Here is the source code of the C program to multiply two complex numbers. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C Program to perform complex number multiplication

```
 */
```
```
#include<stdio.h>
```
```
typedef struct COMPLEX{
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```
    int a;
```
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    int b;
```
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}Complex;
```
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Complex multiply(Complex, Complex);
```
```
int main(){
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    int a1, b1, a2, b2;
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    Complex x, y, z;
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    printf("Enter first complex number : ");

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    scanf("%d+%di", &a1, &b1);
```

    printf("\nEnter second complex number : ");

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    scanf("%d+%di", &a2, &b2);
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    x.a = a1;
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    x.b = b1;
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    y.a = a2; 
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    y.b = b2;
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    z = multiply(x, y);
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    printf("\nAfter multiplication: %d+%di", z.a, z.b);

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    return 0;
```
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}
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Complex multiply(Complex x, Complex y){
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    Complex z;
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    z.a = x.a * y.a - x.b * y.b;
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    z.b = x.a * y.b + x.b * y.a;
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    return z;
```
```
}
```

$ gcc complex.c -o complex
$ ./complex
 
Enter first complex number : 2+1i 
Enter second complex number : 2+1i 
After multiplication: 3+4i

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