c++

c++中CString:: Find , ReverseFind, Left, Right

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2023-09-28 09:32:39
栏目: 编程语言

In C++, CString is a class provided by MFC (Microsoft Foundation Class) that encapsulates a null-terminated string of characters. It is similar to the standard C string but provides additional functionality and ease of use.

  1. Find: This method is used to find the first occurrence of a substring within the CString object. It takes the substring to search as a parameter and returns the zero-based index of the first occurrence if found, or -1 if not found. The method signature is:
int Find(LPCTSTR lpszSub);
  1. ReverseFind: This method is used to find the last occurrence of a substring within the CString object. It takes the substring to search as a parameter and returns the zero-based index of the last occurrence if found, or -1 if not found. The method signature is:
int ReverseFind(LPCTSTR lpszSub);
  1. Left: This method is used to extract a specified number of characters from the left side of the CString object. It takes the number of characters to extract as a parameter and returns a new CString object containing the extracted characters. The original CString object remains unchanged. The method signature is:
CString Left(int nCount) const;
  1. Right: This method is used to extract a specified number of characters from the right side of the CString object. It takes the number of characters to extract as a parameter and returns a new CString object containing the extracted characters. The original CString object remains unchanged. The method signature is:
CString Right(int nCount) const;

These methods provide useful string manipulation functionality in C++ using the CString class.

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