Data type of character constants in C and C++

In C, data type of character constants is int, but in C++, data type of same is char.  If we save below program as test.c then we get 4 as output (assuming size of integer is 4 bytes) and if we save the same program as test.cpp then we get 1(assuming size of char is 1 byte) 

Output of C++ program:

1

Output of C program:

4

References: https://en.wikipedia.org/wiki/C_syntax#Character_constants