#include<stdio.h>

void readData(int*tableArray) /*<-problem!!!*/
{
  FILE*data;
  
  int x=0;
  
  data=fopen("data.txt","r");
  if(data==NULL)
  {
    printf("Failed to open data.txt");
    exit(0);
  }

  for(x=0;x<=19;x++)
  {
    fscanf(data,"\n%s %s %f %d",tableArray[x].site,tableArray[x].date,tableArray[x].reading,tableArray[x].rating);
  }

  fclose(data);
}

int main(void)
{
  struct table
  {
    char site[9];
    char date[11];
    float reading;
    int rating;
  };

  struct table tableArray[20];
  
  readData(&tableArray);
  
  return(0);
}

struct p
{
	int i;	char c;
};
void func(struct p*);
void main()
{
	struct p myp;
	myp.i=10;	myp.c='a';
	func(&myp);
}
void func(struct p *mp)
{
	printf("%d %c",mp->i,mp->c);
}