Using enum type in a switch statement

Question

I am using a switch statement to return from my main function early if some special case is detected. The special cases are encoded using an enum type, as shown below.

typedef enum {     NEG_INF,     ZERO,     POS_INF,     NOT_SPECIAL } extrema;  int main(){      // ...      extrema check = POS_INF;      switch(check){         NEG_INF: printf("neg inf"); return 1;         ZERO: printf("zero"); return 2;         POS_INF: printf("pos inf"); return 3;         default: printf("not special"); break;     }      // ...      return 0;  } 

Strangely enough, when I run this, the string not special is printed to the console and the rest of the main function carries on with execution.

How can I get the switch statement to function properly here? Thanks!

Answer 1

No case labels. You've got goto labels now. Try:

switch(check){     case NEG_INF: printf("neg inf"); return 1;     case ZERO: printf("zero"); return 2;     case POS_INF: printf("pos inf"); return 3;     default: printf("not special"); break; } 

Answer 2

You haven't used the keyword "case". The version given below will work fine.

typedef enum {     NEG_INF,     ZERO,     POS_INF,     NOT_SPECIAL  } extrema;  int main(){      extrema check = POS_INF;      switch(check){         case NEG_INF: printf("neg inf"); return 1;         case ZERO: printf("zero"); return 2;         case POS_INF: printf("pos inf"); return 3;         default: printf("not special"); break;     }      return 0;  }