Question

Getting a segmentation fault for the following code. Please advise.

struct columns {
      char* c_name;
      char* c_type;
      char* c_size;
};

int main(int argc, char* argv[])
{
  int column_num = 3;
  struct columns col[10];
  //columns *col = (columns*) malloc (sizeof(columns) * column_num);
  strcpy(col[0].c_name, "PSID");
  strcpy(col[0].c_type, "INT");
  strcpy(col[0].c_size, "4");
}

I am using 2 ways to allocate space for columns structure but continue to get a segmentation fault. Am I missing something?

Answer 1

Try this (strdup takes care of storage but remember to free when you are done):

struct columns {
  char* c_name;
  char* c_type;
  char* c_size;
};

int main(int argc, char* argv[])
{
  int column_num = 3;
  struct columns col[10];

  col[0].c_name = strdup("PSID");
  col[0].c_type = strdup("INT");
  col[0].c_size = strdup("4");

  return 0;
}