从我所看到的,我应该能够在枚举上运行一个开关,但是我正在吐出错误:
enum EMETH {TRAP=1, SIMP=2, MIDP=3, SINF=4}; switch(METH) { case "TRAP": Meth=&Integrators::Trap; break; case "SIMP": Meth=&Integrators::Simp; break; case "MIDP": Meth=&Integrators::Midp; break; case "SINF": Meth=&Integrators::SInf; break; }
错误是
error: invalid conversion from ‘const char*’ to ‘int’ [-fpermissive] case "TRAP": error: ‘(int)((long int)"TRAP")’ is not a constant expression
对于每个案例.
通过在枚举成员的名称周围加上引号,你已经使它们成为字符串常量.因此,您正在进行无效转换的错误.switch语句在序数上运行,这就是枚举成员.所以删除"".
enum EMETH {TRAP=1, SIMP=2, MIDP=3, SINF=4}; switch(METH) { case TRAP: Meth=&Integrators::Trap; break; case SIMP: Meth=&Integrators::Simp; break; case MIDP: Meth=&Integrators::Midp; break; case SINF: Meth=&Integrators::SInf; break; }