Other answers correctly point out the pointer expression is equivalent to a[3][3] is an out of bound operation, but to give a straight answer to the question asked by op, result value is an integer whose value is unpredictable because a[3][3] refers to a value in memory space beyond the array four integer size spaces away from the last element of a, such memory space may or may not be accessible so reading it will either cause the program to crash or to return a garbage value.