#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void sort_string(char*);
int main()
{
char string[100];
printf("Enter some text\n");
gets(string);
sort_string(string);
printf("%s\n", string);
return 0;
}
void sort_string(char *s)
{
int c, d = 0, length;
char *pointer, *result, ch;
length = strlen(s);
result = (char*)malloc(length+1); //use of pointer here
pointer = s;
for ( ch = 'a' ; ch <= 'z' ; ch++ )
{
for ( c = 0 ; c < length ; c++ )
{
if ( *pointer == ch )
{
*(result+d) = *pointer;
d++;
}
pointer++;
}
pointer = s;
}
*(result+d) = '\0';
strcpy(s, result);
free(result);
}
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