Why “initializer-string for array of chars is too long” compiles fine in C & not in C++?

Question

Following program compiles fine in C with warnings but fails in compilation in C++. Why? What is the reason?

#include 
int main(void)
{
    c         


        

Answer 1

A valid string in C and C++ should have a \0 terminator and in

char a[5]="Hello";

There is no space for null terminator and a is not a valid string.

So this might not be a error in C but you are bound to hit with issues when using in-built string functions like strlen() and family.