判断字符串是否为回文

#include<iostream> #include<string> using namespace std; int is_parnumber(const string s) { size_t s_size = s.size(); for (size_t i=0;i<s_size;++i) { if (s[i] != s[s_size -1 - i]) return 0; } return 1; } int main() { string s; cin >> s; int b = is_parnumber(s); if (b == 1) cout << "yes"; else cout << "no"; return 0; }