string s;
cout << s[s.length()-1] << endl;
s长度为零有问题
另外一种
string s;
char c=s.back();
string s;
cout << *s.rbegin() << endl;
微信扫一扫
string s;
cout << s[s.length()-1] << endl;
s长度为零有问题
另外一种
string s;
char c=s.back();
string s;
cout << *s.rbegin() << endl;
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