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c++switch-statementthrow

throw statement in switch

I try to run a code, but I cannot understand what throw statement do in this part, I thought that we can use ´throw´ statement in try-catch block. any can help me with this example:

switch(npt) {
  case 1: {
    a = NPoint1;
    b = NLine1;
    break;
  }
  .
  .
  .
  case 5: {
    a = NPoint2;
    b = NLine2;
    break;
  }
  default:
    printf("what you entered is wrong");
    throw 1;
  };
  return 1;
}

thanks in advance for any help

Solution

  • throw is catched by the nearest try-catch block. If it's not in your own code, it's in the code that invoked your's and so on up the stack.