Материал из C\C++ эксперт
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Use fwrite and fread to save and read
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE *fp;
int i;
/* open file for output */
if((fp = fopen("my.txt", "wb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
i = 100;
if(fwrite(&i, 2, 1, fp) != 1) {
printf("Write error occurred.\n");
exit(1);
}
fclose(fp);
/* open file for input */
if((fp = fopen("myfile", "rb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
if(fread(&i, 2, 1, fp) != 1) {
printf("Read error occurred.\n");
exit(1);
}
printf("i is %d", i);
fclose(fp);
return 0;
}
