Telephone Book

#include <stdio.h>
#include<stdlib.h>
#include<string.h>

int main()
{
    int i=0,k,j,x;
    char name[100][50],num[100][12],csearch[50],temp[50],temp1[50];
    int input,next;
again:
    printf("1 . Add Contacts\n2 . Check Number\n3 . Show All Number\n4 . Edit Number\n5 . Delete All Number\n6 . Exit\n\nEnter Your Input : ");
    scanf("%d",&input);
    fflush(stdin);
    if(input==1)
    {
        printf("\n\t\t<< Add Contacts >> ");
        printf("\nEnter Name : ");
        gets(name[i]);
        printf("Enter Number : ");
        gets(num[i]);
        printf("\n");
        i++;
        goto again;
    }

    if(input==2)
    {
        printf("Enter The Name Or Number To Search : ");
        gets(csearch);
        for(j=0,x=0; j<i; j++)
        {
            if(strcmp(name[j],csearch)==0||strcmp(num[j],csearch)==0)
            {
                printf("\n\tName : %s \n\tMobile No : %s \n\n",name[j],num[j]);
                x=1;
            }
        }
        if(x==0)
        {
            printf("\n\t**Search Key Not Found**\n\n");
        }
        goto again;
    }
    if(input==3)
    {
        again1:
        if(i==0||strcmp(name[0],"end")==0)
        {
            printf("\n\t**No Contacts Available**\n\n");
            goto again;
        }
        else
        {
            for(j=0,k=1; j<i; j++)
        {
                printf("\t%d . %s - %s\n",k,name[j],num[j]);
                k++;
        }
        printf("\nPress 0 To Go To Main Menu\nPress 1 - %d To Delete Number",k-1);
        printf("\n");
        scanf("%d",&next);
        if(next==0)
            goto again;
        else
        {
            for(j=next-1; j<i; j++)
            {
                strcpy(name[j],name[j+1]);
                strcpy(num[j],num[j+1]);
            }
            i--;
            goto again1;
        }
        }
    }
    if(input==5)
    {
        for(j=0; j<i; j++)
        {
            strcpy(name[j],"end");
        }
        goto again;
    }
    if(input>6||input<1)
    {
        printf("\nInvalid Input\n\n");
    goto again;
    }
    if(input==6)
    {
        return 0;
    }

 if(input==4)
 {
     again2:
  printf("\n\t\t<<Edit This Number>>\n");
  if(i==0||strcmp(name[0],"end")==0)
        {
            printf("\n\t**No Contacts Available**\n\n");
            goto again;
        }
        else
        {
            for(j=0,k=1; j<i; j++)
        {
                printf("\t%d . %s - %s\n",k,name[j],num[j]);
                k++;
        }
        printf("\nPress 0 To Go To Main Menu\nPress 1 - %d To Edit Number",k-1);
        printf("\n");
        scanf("%d",&next);
        if(next==0)
            goto again;
        else
        {
            printf("Enter The Current Name Or Number : ");
            fflush(stdin);
            gets(temp);
            printf("Enter The New Name Or Number To Change : ");
            gets(temp1);

            if(strcmp(name[next-1],temp)==0)
            {
                strcpy(name[next-1],temp1);
            }
            else if(strcmp(num[next-1],temp)==0)
            {
               strcpy(num[next-1],temp1);
            }
            goto again2;
        }

 }
 }

    return 0;
}