C + +: warning:deprecated conversion from string constant to ' char* ' [-wwrite-strings]

2016-12-5 16:17:09

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In the development of the CTP system under CentOS, in the process of introducing C + + program, compile (g++ * * * *), there are the following tips

"1" testmdapi.cpp:15:45: warning:deprecated Conversion from string constant to ' char* ' [-wwrite-strings]
Char *ppinstrumentid[] = {"cu0907", "cu0909"}; Market Subscription List
^
TESTMDAPI.CPP:15:45: warning:deprecated Conversion from string constant to ' char* ' [-wwrite-strings]

Although there is such a hint, but it is still valid C + + code, because the written char* is a C-style string, so g++ does not recognize

You can choose to add when compiling: g++-wno-write-strings text.cpp//Ignore warning ...

Actually, it's not very safe.

"2" testmdapi.cpp:21:15: Error: ':: Main ' must return ' int '
void Main (void)

Not a problem with the code, but a compiler problem

The C language standard allows the main function to be void type

Instead, the standard for C + + must be of type int

However, many Ides or compilers do not necessarily keep the C + + standard, such as vs

C + +: warning:deprecated conversion from string constant to ' char* ' [-wwrite-strings]