Inserting a value into a Sorted Linked List

LinkedList.c

//
// Inserted a value into a Sorted Linked List
//

#include<stdio.h>
#define ArryNumber 20

// Global Variable

int INFO[ArryNumber];  //INFO[20];
int LINK[ArryNumber];  //LINK[20];
int START , AVAIL;
void INSLOC(int,int);
int FINDA(int);

// Main Function
void main()
{
    //cmt : Local Variable
    int PTR , ITEM , LOC;

    // You can write like this
    INFO[2] = 15;  LINK[2] = 4;
    INFO[4] = 20;  LINK[4] = 6;
    INFO[6] = 25;  LINK[6] = 8;
    INFO[8] = 30;  LINK[8] = 10;
    INFO[10] = 36; LINK[10] = -1;
                   LINK[11] = 1;
    // Or this
    /*
    INFO[2] = 15; INFO[4] = 20; INFO[6] = 25; INFO[8] = 30;INFO[10] = 36;
    LINK[2] = 4;  LINK[4] = 6; LINK[6] = 8; LINK[8] = 10; LINK[10] = -1; LINK[11] = 1;
    */

    START = 2;
    AVAIL = 11;

    PTR = START;
    printf("  LIST : \n\n");
    while(PTR != -1)
    {

        printf("\t%d\n",INFO[PTR]);
        PTR = LINK[PTR];
    }

    printf("\n\n Enter The ITEM to be inserted : ");
    scanf("%d",&ITEM);

    LOC = FINDA(ITEM);
    INSLOC(ITEM,LOC);

    PTR = START;

    printf("\n\n");
    printf("   Modified LIST : \n\n");
    while(PTR != -1)
    {
        printf("\t%d\n",INFO[PTR]);
        PTR = LINK[PTR];
    }

}

//Sub Function
void INSLOC(int I,int L)
{
    int NEW;
    if(AVAIL == NULL )
        {
            printf("\nOverload");
            exit(1);
        }

    NEW = AVAIL;
    INFO[NEW] = I;
    if(L == -1)
        {
            LINK[NEW] = LINK[L];
            LINK[L] = NEW;
        }
    else
        {
            LINK[NEW] = LINK[L];
            LINK[L] = NEW;
        }
}

//Sub Function
int FINDA(int I)
{
    int L , SAVE ,P;

    if(START == -1)
        {
            L = -1;
            return(L);
        }
    if(I < INFO[START])
        {
            L = -1;
            return(L);
        }

    SAVE = START;
    P = LINK[START];

    while(P != -1)
        {
            if(I < INFO[P])
                {
                    L = SAVE;
                    return(L);
                }

            SAVE = P;
            P = LINK[P];
        }

    L = SAVE;
    return(SAVE);
}



// Link Create and Coded by EWU.ICE.Student.Fall13.Name("Arnob")