char array in structs - why does strlen() return the correct value here?

Question

I have a simple program like this:

#include 
#include 
#include 

typedef struct 
{
    int numberOfDays;
             


        

Answer 1

The reason is that your months are indeed nul-terminated. If you have an array with 10 elements, and have an initialiser for 3 elements, then the rest is filled with 0's. If you had a month with 11 characters, the compiler would tell you. If you had a month with 10 characters, you would be in trouble because there would be no nul-termination, and the compiler wouldn't tell you.