permutations

#include <stdio.h>#include <string.h>#define SWAP(x,y,t) ((t)=(x),(x)=(y),(y)=(t))void perm(char *list,int k,int m){char temp;if(k==m){printf("%s\n",list);}else{for(int i=k;i<=m;i++){SWAP(list[i],list[k],temp);perm(list,k+1,m);SWAP(list[i],list[k],temp);}}}int main(){char list[1024];scanf("%s",list); perm(list,0,strlen(list)-1);return 0;} 

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