Created
December 9, 2014 13:55
-
-
Save ajaynitt/6906100b29159197d8ab to your computer and use it in GitHub Desktop.
Write a C program to print all permutations of a given string
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# include <stdio.h> | |
/* Function to swap values at two pointers */ | |
void swap (char *x, char *y) | |
{ | |
char temp; | |
temp = *x; | |
*x = *y; | |
*y = temp; | |
} | |
/* Function to print permutations of string | |
This function takes three parameters: | |
1. String | |
2. Starting index of the string | |
3. Ending index of the string. */ | |
void permute(char *a, int i, int n) | |
{ | |
int j; | |
if (i == n) | |
printf("%s\n", a); | |
else | |
{ | |
for (j = i; j <= n; j++) | |
{ | |
swap((a+i), (a+j)); | |
permute(a, i+1, n); | |
swap((a+i), (a+j)); //backtrack | |
} | |
} | |
} | |
/* Driver program to test above functions */ | |
int main() | |
{ | |
char a[] = "ABC"; | |
permute(a, 0, 2); | |
getchar(); | |
return 0; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment