char d[16] = { '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' }; int turn(int x,int A) { int r; r = x % A; x = x / A; if (x != 0) turn(x, A); cout<< d[r];//用ASCII码转会比较麻烦，9和A之间隔了几个符号. return 0; } int main() { int x, m; cin >> x >> m; turn(x, m); cout << endl; return 0; }