Read in Numbers from a File in C

Question

I have a file called points.dat which reads something like:
5
2 5
-1 18
0 6
1 -1
10 0

The first number is how many ordered pai

Answer 1

#include <stdio.h>
#include <stdlib.h>

typedef struct {
        int x, y;
} Point;

int main ()
{
        int numOf;
        Point *myPoints = NULL;
        FILE *myfile = fopen ("myfile.txt","r");
        if (myfile == NULL)
            perror ("Error opening file"); //or return 1;
        else
        {
            fscanf(myfile, "%d", &numOf);
            myPoints = (Point *)malloc(sizeof(Point) * numOf);
            while ( !feof (myfile) && numOf-- )
            {
                fscanf(myfile, "%d %d", &(myPoints[numOf].x), &(myPoints[numOf].y));
            }
        }
        fclose(myfile);
        //Do stuff with array
        free ((void *)myPoints);
        getchar();//Press enter to close debugger etc.
        return 0;
}

Sorry for the delay.

Answer 2

For the first line use int numValuesRead = fscanf(file, "%d", &totnums);

Then, use numValuesRead = fscanf(file, "%d %d", &num1, &num2); to read the other lines.

fscanf returns the number of value read. You should always check it.