完成string从istream流上读取输入

TinySTL/String.h

@@ -598,7 +598,7 @@ namespace TinySTL{
 			return 0;
 		else if (i == len)
 			return -1;
-		else if (j == sublen)
+		else
 			return 1;
 	}
 	int string::compare(size_t pos, size_t len, const string& str, size_t subpos, size_t sublen) const{
@@ -696,6 +696,32 @@ namespace TinySTL{
 		}
 		return os;
 	}
+	std::istream& operator >> (std::istream& is, string& str){
+		char ch;
+		string::size_type oldSize = str.size(), index = 0;
+		bool hasPrevBlank = false, badState = false;
+		while (is.get(ch)){//<2F><><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD>հ<EFBFBD>
+			if (isblank(ch) || ch == '\n')
+				hasPrevBlank = true;
+			else
+				break;
+		}
+		is.putback(ch);
+		while (is.get(ch)){
+			if (ch != EOF && !isblank(ch) && ch != '\n'){
+				if (++index <= oldSize)
+					str[index - 1] = ch;
+				else
+					str.push_back(ch);
+			}else{//istream<61><6D>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
+				badState = true;
+				break;
+			}
+		}
+		if (index < oldSize)
+			str.erase(str.begin() + index, str.end());
+		return is;
+	}
 	string operator+ (const string& lhs, const string& rhs){
 		string res(lhs);
 		return res += rhs;