#include <stdio.h>
#include <string.h>
void swap(char *x, char *y)
{
char temp;
temp = *x;
*x = *y;
*y = temp;
}
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));
}
}
}
int main()
{
char str[100];
scanf("%s",str);
int n = strlen(str);
permute(str, 0, n-1);
return 0;
}
- Problem Description
Given numbers 1,2,3. Write a C Program to Generate All Permutations of the given numbers using BackTracking. - Test Case 1
Input (stdin)123
Expected Output123
132
213
231
321
312 - Test Case 2
Input (stdin)9385
Expected Output9385
9358
9835
9853
9583
9538
3985
3958
3895
3859
3589
3598
8395
8359
8935
8953
8593
8539
5389
5398
5839
5893
5983
5938