Merge pull request liuchuo#25 from xiaorong61/patch-2

Update 1033. 旧键盘打字(20).cpp

Author: liuchuo

PAT乙级(Basic Level)/1033. 旧键盘打字(20).cpp

@@ -32,54 +32,17 @@ _hs_s_a_tst
 如果没有一个字符能被打出，则输出空行。
 重要的事情要说三遍！！
 
+#include <cctype>
 #include <iostream>
 using namespace std;
 int main() {
-    string a, b;
-    getline(cin, a);//为了防止第一行是空的，不能用cin >> a,用getline(cin, a)
-    getline(cin, b);
-    if (a.length() == 0) {
-        cout << b;
-        return 0;
-    }
-    int flag = 0;
-    int lena = a.length();
-    int lenb = b.length();
-    //检验是否有大写
-    for (int i = 0; i < lena; i++) {
-        if (a[i] == '+') {
-            flag = 1;
-            a[i] = '#';
-        }
-    }
-    //去除大写字母
-    if(flag) {
-        for (int i = 0; i < lenb; i++) {
-            if (b[i] >= 'A' && b[i] <= 'Z') {
-                b[i] = '#';
-            }
-        }
-    }
-    //去除其它字母
-    for (int i = 0; i < lenb; i++) {
-        for (int j = 0; j < lena; j++) {
-            if (a[j] == b[i]) {
-                b[i] = '#';
-            }
-            if (a[j] >= 'A' && a[j] <= 'Z' && b[i] == a[j] + 32) {
-                b[i] = '#';
-            }
-        }
-    }
-    int flag1 = 0;
-    //print
-    for (int i = 0; i < lenb; i++) {
-        if (b[i] != '#') {
-            cout << b[i];
-            flag1 = 1;
-        }
-    }
-    if (flag1 == 0)
-        cout << endl;
-    return 0;
-}
+  string bad, should;
+  getline(cin, bad);  //为了防止第一行是空的，不能用cin >> ,用getline(cin, ...)
+  getline(cin, should);
+  for (int i = 0, length = should.length(); i < length; i++) {
+    if (bad.find(toupper(should[i])) != string::npos) continue;
+    if (isupper(should[i]) && bad.find('+') != string::npos) continue;
+    cout << should[i];
+  }
+  return 0;
+}