C Program to Sort the String by Removing Whitespaces and Duplicates

This C Program sort string ignoring whitespaces and repeating characters only once.

Here is source code of the C Program to sort string ignoring whitespaces and repeating characters only once. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C Program to sort string ignoring whitespaces and repeating characters only once

```
 */
```
```
#include <stdio.h>
```
```
#include <string.h>
```
```
 
```
```
#define SIZE 50
```
```
 
```
```
void main()
```
```
{
```

    char string[SIZE], string1[SIZE], string2[SIZE];

    int i, j = 0, a = 0, temp, len = 0, len1 = 0, k = 0;

```
 
```
```
    printf("\nEnter a string:");
```
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    scanf("%[^\n]s", string1);
```
```
 
```
```
    /* Code to remove whitespaces */
```
```
    for (i = 0;string1[i] != '\0';i++)
```
```
    {    
```
```
        if (string1[i] == ' ')
```
```
        {
```
```
            continue;
```
```
        }
```
```
        string[j++] = string1[i];
```
```
    }
```
```
 
```
```
    /* Code to sort the string */
```
```
    for (i = 0;string[i] != '\0';i++)
```
```
    {
```

        for (j = i + 1;string[j] != '\0';j++)

```
        {
```
```
            if (string[i] > string[j])
```
```
            {
```
```
                temp = string[i];
```
```
                string[i] = string[j];
```
```
                string[j] = temp;
```
```
            }
```
```
        }
```
```
    }
```
```
    string[i] = '\0';
```
```
    len = strlen(string);
```
```
 
```

    /* Code to remove redundant characters */

```
    for (i = 0;string[i] != '\0';i++)
```
```
    {
```

        if (string[i] == string[i + 1] && string[i + 1] != '\0')

```
        {
```
```
            k++;
```
```
            continue;
```
```
        }
```
```
        string2[a++] = string[i];
```
```
        string[a] = '\0';
```
```
    }
```
```
    len1 = len - k;
```
```
    printf("The sorted string is:");
```
```
    for (temp = 0;temp < len1;temp++)
```
```
    {
```
```
        printf("%c", string2[temp]);
```
```
    }
```
```
}
```

$ cc string99.c
$ a.out
 
Enter a string:abcdel bcdl abcdefg
The sorted string is:abcdefgl

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