in codeblock for c++ program

student Grade Statics Use functions to determine the number of letter grades from list of students' number grades. The requirements are 1) Initialize the variables countGradeD, countGradeF to 0 a given , countGradeA, countGradeB, countGradec, 2) Validate the input data for the number of students in the class. Display error message if necessary 3) Read a number grade. If the number grade is in between 100-90, for example, then increment the countGradeA count and so on and so forth for all other grades. Letter grades are determined by the following - 90 100 A 80-89 70-79 60-69 0-59 4) Repeat Steps 2 and 3 for each number in the 1ist. 5) Print out the results which shows the counts for each grade. The following functions should be defined/implemented and called in main) - int getNumberofStudents) //make sure to validate number of students void Initialize(int&countGradeA, ints countGradeB, int& countGradec, int& countGradeD, int& countGradeF) void getNumberGrade (int& grade): //make sure to valid the grade void classifyGrades (int grade, int& countGradeA, int& countGradeB int& countGradec, int& countGradeD, int& countGradeF); void printResults (int countGradeA, int countGradeB, int countGradeC, int countGrade D, int countGradeF)