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int main()
{
	int ar[ 2 ] ;
 
	ar++; // error !! ar is constant, it cannot be changed
	ar+=2; // same error
 
	int* p = ar;
	// is the same as :
	int* q = &ar[ 0 ];
	// or
	int* r = &ar;
 
	p++; // okay! this will point to the 2nd element in ar 
}

prog.cpp: In function ‘int main()’:
prog.cpp:5:4: error: lvalue required as increment operand
  ar++; // error !! ar is constant, it cannot be changed
    ^
prog.cpp:6:4: error: incompatible types in assignment of ‘int’ to ‘int [2]’
  ar+=2; // same error
    ^
prog.cpp:12:12: error: cannot convert ‘int (*)[2]’ to ‘int*’ in initialization
  int* r = &ar;
            ^
prog.cpp:10:7: warning: unused variable ‘q’ [-Wunused-variable]
  int* q = &ar[ 0 ];
       ^
prog.cpp:12:7: warning: unused variable ‘r’ [-Wunused-variable]
  int* r = &ar;
       ^

Standard output is empty