Warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]

 -Wwrite-strings           

 In C++, nonzero means warn about deprecated  conversion from string literals to 'char *'.  In C, 

similar warning, except that the conversion is of course not deprecated by the ISO C standard.

g++ 옵션 중 -Wno-write-strings 을 붙여서 컴파일 하면 된다.