C Program to Compute Cross Product of Two Vectors

This is a C Program to find the cross product of two vectors. The cross product or vector product is a binary operation on two vectors in three-dimensional space. It results in a vector that is perpendicular to both and therefore normal to the plane containing them.

Here is source code of the C Program to Compute Cross Product of Two Vectors. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
#include <string.h>
```
```
#include <stdio.h>
```
```
#include <stdlib.h>
```
```
 
```
```
const int LOW = 0;
```
```
const int HIGH = 10;
```
```
int main(int argc, char **argv) {
```
```
    time_t seconds;
```
```
    time(&seconds);
```
```
    srand((unsigned int) seconds);
```
```
 
```
```
    int u1, u2, u3, v1, v2, v3;
```

    u1 = rand() % (HIGH - LOW + 1) + LOW;

    u2 = rand() % (HIGH - LOW + 1) + LOW;

    u3 = rand() % (HIGH - LOW + 1) + LOW;

    v1 = rand() % (HIGH - LOW + 1) + LOW;

    v2 = rand() % (HIGH - LOW + 1) + LOW;

    v3 = rand() % (HIGH - LOW + 1) + LOW;

```
 
```
```
    int uvi, uvj, uvk;
```
```
    uvi = u2 * v3 - v2 * u3;
```
```
    uvj = v1 * u3 - u1 * v3;
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```
    uvk = u1 * v2 - v1 * u2;
```
```
 
```

    printf("The cross product of the 2 vectors \n u = %di + %dj + %dk and \n v = %di + %dj + %dk\n",

```
            u1, u2, u3, v1, v2, v3);
```

    printf(" u X v: %di + %dj + %dk", uvi, uvj, uvk);

```
    return 0;
```
```
}
```

Output:

$ gcc CrossProduct.c
$ ./a.out
 
The cross product of the 2 vectors 
 u = 0i + 0j + 7k and 
 v = 4i + 7j + 2k
 u X v: -49i + 28j + 0k

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