#include
#include
char dest[50];
void Reverse_str(char *src, int hight, int *count);
int main()
{
char str[] = "abcde";
int count = 0;
printf("The previous string is :/n");
puts(str);
printf("----------------/n");
Reverse_str(str, 0, &count);
printf("/nThere %d assign ways!/n", count);
return 0;
}
void Reverse_str(char *src, int hight, int *count)
{
int len = strlen(src);
int i = 0, j = 0;
char *pstr = NULL;
pstr = src;
if(hight == len)
{
for(i = 0; i < len; ++i)
{
putchar(dest[i]);
}
printf("/t");
(*count)++;
if((*count) % 8 == 0)
{
printf("/n");
}
return;
}
while(*pstr != '/0')
{
for(j = 0; j < hight; ++j)
{
if(*pstr == dest[j])
{
break;
}
}
if(j >= hight)
{
dest[hight] = *pstr;
Reverse_str(src, hight+1, count);
}
pstr++;
}
}
