C/C ++ knowledge point (error-prone)

Template FunctionsThe declaration and definition of the c ++ template class/template function should be put in the header file. Do not separate the Declaration and definition of the function in the class (for example, in. declare a member function in the H file. define the member function in the CPP file). This will cause a connection error. The template class/Template Function Definition and declaration should be written in a. h file. STL sortingOne type. To support calling STL sort for sorting, operator <and value assignment should be implemented. Read string (including space)If the fgets input contains a linefeed gets, for example, if the input is Hello + press ENTER fgets: "Hello \ n" gets: "Hello" Pointer SubtractionThe pointer minus pointer is equal to the number of elements between two pointers. For example, the value of int p [10] p + 10-p is 10.