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70 lines
928 B
C++
70 lines
928 B
C++
/*
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* C++ Program to Generate All Permutations using BackTracking
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*/
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#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <cstdlib>
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using namespace std;
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/* swap values at two pointers */
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void swap (char *x, char *y)
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{
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char temp;
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temp = *x;
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*x = *y;
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*y = temp;
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}
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/* print permutations of string */
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void permute(char *a, int i, int n)
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{
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int j;
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if (i == n)
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cout<<a<<endl;
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else
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{
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for (j = i; j <= n; j++)
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{
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swap((a + i), (a + j));
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permute(a, i + 1, n);
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swap((a+i), (a + j));
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}
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}
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}
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/* Main*/
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int main()
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{
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char a[] = "abcd";
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permute(a, 0, 3);
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return 0;
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}
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/*
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abcd
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abdc
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acbd
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acdb
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adcb
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adbc
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bacd
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badc
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bcad
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bcda
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bdca
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bdac
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cbad
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cbda
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cabd
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cadb
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cdab
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cdba
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dbca
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dbac
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dcba
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dcab
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dacb
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dabc
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