program to print permutations of a string code example
Example 1: python all permutations of a string
>>> from itertools import permutations
>>> perms = [''.join(p) for p in permutations('stack')]
>>> perms
Example 2: find all permutations of a string
void permute(string a, int l, int r)
{
if (l == r)
cout<<a<<endl;
else
{
for (int i = l; i <= r; i++)
{
swap(a[l], a[i]);
permute(a, l+1, r);
swap(a[l], a[i]);
}
}
}
Example 3: generate all permutations of string
void perm(char a[], int level){
static int flag[10] = {0};
static char res[10];
if(a[level] == '\0'){
res[level] = '\0';
for(int i = 0; res[i] != '\0'; ++i){
printf("%c", res[i]);
}
printf("\n");
++counter;
}
else{
for(int i = 0; a[i] != '\0'; ++i){
if(flag[i] == 0){
res[level] = a[i];
flag[i] = 1;
perm(a, level + 1);
flag[i] = 0;
}
}
}
}
int main(){
char first[] = "abc";
perm(first, 0);
return 0;
}