sizeof
有以下程序
#include
main()
{ FILE *fp;
int i, a[6]={1,2,3,4,5,6}, k;
fp = fopen("data.dat", "w+b");
fwrite(&a[0], sizeof(int), 1, fp);
for (i=1; i<6; i++)
{ fseek(fp, 0L, 0);
fread(&k, sizeof(int), 1, fp);
fseek(fp, 0L, 0);
a[i] +=k;
fwrite(&a[i], sizeof(int), 1, fp);
}
rewind(fp);
fread(&k, sizeof(int), 1, fp);
fclose(fp);
printf("%d\n", k);
}
程序的运行结果是