Thread: Please help, struct problem.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define NAMESIZE 20
#define STD 36
typedef struct
{
	char studentName[NAMESIZE];
	int classNumber;
	int gradeOne;
	int gradeTwo;
	int gradeYear;
}students;


typedef students classes[STD];  // This is type of 




void scanStudent(classes s);  //CLASSES 
int main()
{
	classes cls;
	scanStudent(cls);
}
void scanStudent(classes cls)   //TRANSFER CLASSES
{
	int;
	for (int i = 0; i < STD; i++)
	{


		printf("Please enter student name\n");
		gets(cls[i].studentName);
		printf("Please enter the CLASS NUMBER in range between 5-1 *****\n");
		_flushall();
		do
		{
			scanf("%d", &cls[i].classNumber);
		} while (cls[i].classNumber>5 || cls[i].classNumber<0);
		printf("Please enter the grade of first semester\n");
		_flushall();
		do
		{
			scanf("%d",&cls[i].gradeOne);
			if (cls[i].gradeOne > 100 || cls[i].gradeOne < 0)
				printf("Wrong value please reenter\n");
		} while (cls[i].gradeOne> 100 || cls[i].gradeOne < 0);
		_flushall();
		printf("Please enter the grade of Second semester\n");
		do
		{
			scanf("%d",&cls[i].gradeTwo);
			if (cls[i].gradeTwo>100 || cls[i].gradeTwo < 0)
			printf("Wrong value please reenter\n");
		} while (cls[i].gradeTwo>100 || cls[i].gradeTwo < 0);




		cls[i].gradeYear = (cls[i].gradeOne + cls[i].gradeTwo) / 2;
	}


}

The first scan works perfect on the next scan its skips name and scan continue to class number, can't find a problem in debugger please need advise thank you.