Read a file line by line and put all numbers in one line to an array.

readnumbers.c

#include "stdio.h"
#include "stdlib.h"
#include "string.h"

/* Sample Input *** input_vectors.txt
0 1
1 1
0 1
1 1
0 1
1 0
0 0
1 0
0 0
1 0
*/

int main(int argc, char *argv[])
{
    char line[500];
    
    FILE *file = fopen(argv[1], "r");
    
    while (fgets(line, sizeof(line), file) != NULL) {
        char* end = line;
        int count = 0;
        do {
            strtol(end, &end, 10);
            count++;
            end++;
        } while (strcmp(end, "\n"));
        
        int *array = (int *)malloc(sizeof(int)*count);
        
        end = line;
        for (int i = 0; i < count; i++) {
            array[i] = (int)strtol(end, &end, 10);
            end++;
        } while (strcmp(end, "\n"));
        
        // do something with the array
        printf("%d\n", array[1]);
        
        free(array);
    }

    return 0;
}