Thread: Confused with pointers and structs

I am writting a prohram that declares a struct with 3 ints and 1 float called weather_t. I must read the data in from a txt file for 12 months of data which would be 48 numbers. I need 2 functions one that load the stats- int loadstats and one that prints the stats. Main is declaring the array and open and closing the data. My problem is I am using a loop to take the data from the file and trying to load it into the array using fread with a file pointer.
I would think reading it in 4 peices at a time would be appropiate because there is 4 per month. The next step is trying to pass that data and loaded into the struct with the function- it doesdn't like (fp, weather_t) and for print purposes it doesn't like weather_t wdata

Code:

#include <stdio.h>
	typedef struct {
	int avg_high_temp;
	int avg_low_temp;
	float avg_precip;
	int avg_wind_speed;
	} weather_t;
	
	//int loadstats(fp, weather_t );  prototype

	//void printstats(weather_t wdata[]);  protoyype	
	
int main(int argc, char *argv[])
{
	weather_t wdata [48];

   	FILE *fp;
	fp=fopen("wfile.txt", "r");
	
for(i = 0; i < weather_t wdata; i+=4)
	{
	fread(&weather_t wdata [i], sizeof(int),48,fp);
		
}
   
 return 0;
}
	int loadstats(fp, weather_t );


	void printstats(weather_t wdata[]);

Any help is appreciated

fread and fwrite are intended for binary files. You're using a text file, so try some other I/O functions.

fgetc is a way to input a character at a time but the problem is the data is 3 ints and 1 float so how do I get mixed data in? I see that fread is for binary only- my mistake

Perhaps fscanf()

Here is my new code:

Code:

#include <stdio.h>
	typedef struct {
	int avg_high_temp;
	int avg_low_temp;
	float avg_precip;
	int avg_wind_speed;
	} weather_t;
	
	int loadstats(FILE*wfile, weather_t  wstats[]);

	void printstats(weather_t wstats[]);

	
	int main(int argc, char *argv[])
	{
	weather_t wstats [12];
	int i;
	FILE*fp;
		fp=fopen("wfile","r");
	for (i=0; i < 48;i+=4)
	{
	fscanf(fp, "%i\n%i\n%f\n%i\n",&weather_t wstats[i]);

			
	}
	
  	

 return 0;
}

on the fscanf I want to read 2 ints,a float then another int from my file to the array however it states illigal use of weather_t. Can I not use the struct name to load the array