Generate a table in C++

Problem:

Q. Write a program that print a table of any given number by checking the condition if the given is not equal to zero then generate a table. used not operator.

Program:

#include<stdio.h>

#include<conio.h>

int main ()

not operator in c++

{

                int a,b,i;

                printf("enter a number");

                scanf("%d",&a);

                if(!(a==0))

                {

                for(i=1;i<=10;i=i+1)

                {

                                b=a*i;

                                printf("\n%d x%d =%d",a,i,b);

                }

    }

                getch();

}

 what is not operator. see detail