void reverse(char* s)
{
int i, slen, t;
for (slen = 0; s[slen+1] != '\0'; slen++);
for (i = 0; i <= slen/2; i++) {
t = s[i];
s[i] = s[slen-i];
s[slen-i] = t;
}
}
void reverse(char* s)
{
int i, slen, t;
for (slen = 0; s[slen+1] != '\0'; slen++);
for (i = 0; i <= slen/2; i++) {
t = s[i];
s[i] = s[slen-i];
s[slen-i] = t;
}
}