cin >> c;
if (c=='y') cout << "your input is y !" <
if (c=='n') cout << "your input is n !" <
当然,也可以是:
if (c=='y') cout << "your input is y !" <
===========
char s[5]; // 字符串
cin >> s;
if (c[0]=='y') cout << "your input is y !" <
if (c[0]=='n') cout << "your input is n !" <