Data Structure Programming

1. Read any number and check whether a number is prime or not. #include<stdio.h> void main() {      int i,n,flag=0;      printf("Enter a positive number:\n");      scanf("%d",&n);      for(i=2;i<(n/2);i++)      {           if(n%i==0)           {               flag=1;               break;           }      }     if (n==1)       {          printf("1 is neither a prime nor a composite number.\n");       }     else     {     ...