Hi. I used the following code, and appeared the error "error C110: non-constant case/dim expresion" at the "case" line, what does it mean? ...
void main(void){ char command[]={1,2,3,4,5,6,7,8}; char word; //........ while(1){ /* ......... some lines of code */ switch(word){ case command[0]: // do somthing break; //................... case command[7]: // do somthing break; } } }
Thank you.
"6.8.4.2 The switch statement ... 3 The expression of each case label shall be an integer constant expression and no two of the case constant expressions in the same switch statement shall have the same value after conversion. ..."
"6.6 Constant expressions ... 6 An integer constant expression shall have integer type and shall only have operands that are integer constants, enumeration constants, character constants, sizeof expressions whose results are integer constants, and floating constants that are the immediate operands of casts. Cast operators in an integer constant expression shall only convert arithmetic types to integer types, except as part of an operand to the sizeof operator. ..."
Bold emphasis is mine.