C Language Project For Gathering Student Information

Below is a simple C Language Program using structures, Pointers, Functions (Call by References/Value) with simple graphics.
Download Below Code And Run it with Dev C++ 

#include
#include
#include
#include

int arr[2][5];
struct student
{
int roll;
char gpa[3];
char name[20];
char department[30];
char city[15];
};
struct student s[50];
void detail(struct student d[],int z);       // Passing structure to function
void show(struct student k[],int l);         // Passing structure to function
void teacher(struct student o[],int p);      // Passing structure to function
void search(struct student t[],int y);       // Passing structure to function
void citys(struct student e[],int r);        // Passing structure to function
void topper(struct student m[],int h);       // Passing structure to function
void descending(struct student p[],int u);   // Passing structure to function
void time(struct student a[], int s);        // Passing structure to function
void budget(int my[][5]);                    // Passing structure to function
void department(struct student c[], int v);  // Passing structure to function
int n=0;
int i;
int main()
{
		system("COLOR 5f");
printf("*************************************************************************************************************\n");
printf("*************************************************************************************************************\n");
printf("*\t\t\t\t\t\t\t\t\t\t\t\t\t\t    *\n");
printf("*\t\t\t\t\t\t\t\t\t\t\t\t\t\t    *\n");
printf("*\t\t\t\t    Welcome To Our New School System\t\t\t\t\t\t    *\n");
printf("*\t\t\t\t\t    Hope You Like IT\t\t\t\t\t\t        *\n");
printf("*\t\t\t\t\t\t\t\t\t\t\t\t\t        *\n");
printf("*\t\t\t\t\t\t\t\t\t\t\t\t\t        *\n");
printf("*\t\t\tI wish my school days could have dragged on a little longer,\t\t\t\t    *\n*\t\t\t\tor that I could go back and do it later in life.\t\t\t\t    *\n");
printf("*************************************************************************************************************\n");
printf("*************************************************************************************************************\n");
printf("Press Any Key To Continue");
getch();
int x;
do
{
printf("\n\nPress 1 To Enter Data\n");
printf("Press 2 To Show All Data\n");
printf("Press 3 To Show Our Teacher Staff\n");
printf("Press 4 To To Search Student By Name\n");
printf("Press 5 To Search Student By City\n");
printf("Press 6 To See the Ascending Order\n");
printf("Press 7 To See The Descending Order\n");
printf("Press 8 To See The Time Table\n");
printf("Press 9 To Enter Budget Plan\n");
printf("Press 10 To Search Student By Department\n");
printf("Press 0 to Exit\n");
scanf("%d",&x);
switch (x)
{
case 1:
{
detail(s,50);             // Calling Function
/*
for(i=n;i<=n;i++)
{
s[i].roll=i+1;
printf("Enter for Student %d \n\n",s[i].roll);
printf("Enter Name : ");
scanf("%s",s[i].name);
//printf("Enter GPA : ");
//scanf("%s",s[i].gpa);
printf("Enter Department : ");
scanf("%s",s[i].department);
printf("Enter GPA : ");
scanf("%s",s[i].gpa);
}             */
n++;
break;
}
case 2:
{
show(s,50);             // Calling Function
/*
for(i=0;im[k+1].gpa);
			{
				student p;
			p=m[k];
			m[k]=m[k+1];
			m[k+1]=p;	
			}
		}
	}
	for(k=0;k