Segmentation error when splitting up a number into digits C-CodePudding

I'm trying to write a function in C that will take all the digits of a positive integer and add them together. Here's my code:

int num_test(score){
  int total = 0;
  while(score){
   total  = (score );
    score /= 10;
}
  return total;
}

However, I keep receiving signal: segmentation fault (core dumped) every time I try to pass anything to it in my main function. I'm relatively new to C, so I'm unsure on how to fix this error.

CodePudding user response：

Your function 'signature' needs to know the datatype it receives

int num_test(score){
  int total = 0;
  while(score){
   total  = (score );
    score /= 10;
}
  return total;
}

int num_test( int score ) {
    int total = 0;
    while(score) {
        total  = (score );
        score /= 10;
    }
    return total;
}

Or, there could be other problems in unpublished code.

CodePudding user response：

it's the problem with not specifying a data type for the parameter called score

so instead of :

int num_test(score)

write :

int num_test(int score)

or what ever you like, it may be unsigned int score or whatever you like, but you have to specify a data-type for the function paramter