C Program to Find Missing Numbers in Array

This C Program identifies missing numbers in a given array.

Here is source code of the C Program to identify missing numbers in a given array. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/* 
```

 * C Program to identify missing numbers in a given array

```
 */
```
```
#include <stdio.h>
```
```
 
```
```
void main()
```
```
{
```
```
    int n, i, j, c, t, b;
```
```
 
```
```
    printf("Enter size of array : ");
```
```
    scanf("%d", &n);
```

    int array[n - 1];     /* array size-1 */

    printf("Enter elements into array : \n");

```
    for (i = 0; i < n - 1; i++)    
```
```
        scanf("%d", &array[i]);
```
```
    b = array[0];
```
```
    for (i = 1; i < n - 1; i++)
```
```
        b = b ^ array[i];
```
```
    for (i = 2, c = 1; i <= n; i++)
```
```
        c = c ^ i; 
```
```
    c = c ^ b;  
```

    printf("Missing element is : %d \n", c);

```
}
```

$ cc bit30.c
$ a.out
Enter size of array : 6
Enter elements into array : 
1
2
3
5
6
Missing element is : 4

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