#define num(x) (sizeof (x) / sizeof (*x))int _tmain(){ int number[10] = {1,1,1,1,1,1}; char *teststr[20] = {'','','','','','','','',''}; printf('Size of number[10] is %d\n', num(number)); printf('Size of teststr[20] is %d\n', num(teststr));}