1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
typedef struct {
int x;
int y;
} Point;
int main(int argc, char* argv[]) {
char const* filename = __FILE__ ".bin";
// write point to file
FILE* output_file = fopen(filename, "w");
Point p = { .x = 7, .y = 8 };
printf("Position is %ld\n", ftell(output_file));
fwrite(&p, sizeof(p), 1, output_file);
printf("Position is %ld\n", ftell(output_file));
fclose(output_file);
// read point from file
FILE* input_file = fopen(filename, "r");
Point input_point;
printf("Position is %ld\n", ftell(input_file));
fread(&input_point, sizeof(input_point), 1, input_file);
printf("Position is %ld\n", ftell(input_file));
printf("(x, y) == (%d, %d)\n", input_point.x, input_point.y);
fclose(input_file);
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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