c++ - The difference between 0 and '0' in array

Question

I have a question about array initialization

What is the difference between

char a[6]={0};

and

char a[6]={'0','0','0','0','0','0'};

How does the compiler interpret the above two expression? Are they just the same or not??

Answer 1

'0' is the ASCII character for the number 0. Its value is 48.

The constant 0 is a zero byte or null byte, also written ''.

These four are equivalent:

char a[6] = {0};
char a[6] = {0, 0, 0, 0, 0, 0};
char a[6] = {'', '', '', '', '', ''};
char a[6] = ""; // sixth null byte added automatically by the compiler