/Java/Permutation and combination program in c

Permutation and combination program in c

// C program to print all permutations with duplicates allowed 
#include <stdio.h> 
#include <string.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 l, int r) 
{ 
int i; 
if (l == r) 
    printf("%s\n", a); 
else
{ 
    for (i = l; i <= r; i++) 
    { 
        swap((a+l), (a+i)); 
        permute(a, l+1, r); 
        swap((a+l), (a+i)); //backtrack 
    } 
} 
} 
  
/* Driver program to test above functions */
int main() 
{ 
    char str[] = "ABC"; 
    int n = strlen(str); 
    permute(str, 0, n-1); 
    return 0; 
}

Source: grepper.com

Similar codes

0 vote199 views1 answer
Database springboot
Java
0 vote213 views2 answers
How to make it another player's turn java
Java
0 vote198 views2 answers
Java find index of first alpha character in string
Java
1 vote217 views1 answer
Java boolean 2d array
Java
0 vote224 views1 answer
How to call same activity again in android
Java
0 vote203 views1 answer
Initialize empty dictionary java
Java
0 vote191 views2 answers
Downcasting in java
Java
0 vote213 views1 answer
Java.lang.long cannot be cast to java.lang.integer
Java
0 vote200 views1 answer
Textview set text bold programmatically
Java
0 vote202 views1 answer
Area of a Circle in Java Programming
Java