Update 重要.cpp
赋值运算符重载拷贝的dest和src反了
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		@@ -21,7 +21,7 @@ public:
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    const String &operator=(const String &R)
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    {
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        length = R.length;
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        strcpy(R.sPtr, sPtr);
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        strcpy(sPtr, R.sPtr);
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        return *this;
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    };                                         //重载赋值运算符 =
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    const String &operator+=(const String &R); //字符串的连接 +=
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