Apr 1, 2012

C Program to find all the permutations of a given string.

Write a c program to find all the permutations of a given string.
Example: If the given string is sam, output is,
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# include<stdio.h>
# include<conio.h>
void swap (char *x, char *y)
    char temp;
    temp = *x;
    *x = *y;
    *y = temp;

void permute(char *a, int i, int n)
    int j;
    if (i == n)
    printf("%s\n", a);
        for (j = i; j <= n; j++)
            swap((a+i), (a+j));
            permute(a, i+1, n);
            swap((a+i), (a+j));

int main()
    char str[80] ;
    int len=0,i;
    puts("Enter a string:\n\n");
    for (i=0; str[i] != '\0'; i++)
    permute(str, 0, len);
    return 0;
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