Program to delete n Characters from a given position in a given string using functions

#include "stdio.h"
#include "conio.h"
#include "string.h"
 
void delchar(char *x,int a, int b);
 
void main()
{
     char string[10];
     int n,pos,p;
     clrscr();
 
     puts("Enter the string");
     gets(string);
     printf("Enter the position from where to delete");
     scanf("%d",&pos);
     printf("Enter the number of characters to be deleted");
     scanf("%d",&n);
     delchar(string, n,pos);
     getch();
}
 
// Function to delete n characters
void delchar(char *x,int a, int b)
{
  if ((a+b-1) <= strlen(x))
  {
    strcpy(&x[b-1],&x[a+b-1]);
    puts(x);
    }
}