I am facing difficulty in writing the code in cpp for the following problem.

Implement the following functions 1: getSize(int &size) This function prompts the user to enter the size of array Input Validation=>Make sure that user must enter the size > 0. 2: createArray(int &arrSize) // write appropriate return type This function create a 1D dynamic int array of size "arrSize" and return this array to main function. 3: fillArray // write the parameter list and return type This function receives an array and fill this with user defined input. Input Validation=>Make sure that user enter the value in the range of (100-200) 4: reSizeArray // write the parameter list and return type This function increases the size of array by 2 and stores the value -1 on last two indexes. 5: display WWW WWW