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("%sn", 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:nn");
for (i=0; str[i] != ''; i++)
permute(str, 0, len);
return 0;
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