[Code 1] :Module test practical

/*Question 3:
Write menu-based program with the following menu:
1. Input N and array of integer
2. Find the largest negative number value
3. Count the number that is not square numbers
4. sort all elements by descending and display them
5. Exit

Q1: Input N and array of integer
  when user chooses 1 from main menu, do the followings
- fist, display 'N=' and accept positive integer N
- then, accept N integer and store them into array
Q2: Find the largest negative number value
  when user chooses 2 from main menu, find the largest numbet
value in the array (which accept in the first menu) and return this value
to the main function for printing out.
(Note: if the array has no negative number, return 0)
Q3: Count the number that is no square numbers
 when the user chooses 3 from main menu, count the number that is
not square number and return it to the main function for printing out
(it the array has no numbe, dispay 0)
Q4: Sort all element by decending and display them
 when user chooses 4 from main menu, sort all elements by decending
and display
Q5: Exit
 when user chooses 5 from main menu, the program will be exit. */

#include<conio.h>
#include<stdio.h>
// khai bao ham con
void input(int a[], int *n);
void show(int a[], int n); // hien thi mang vua nhap
int maxne(int a[], int n);// tra ve cho ham main in ra
int checkcp(int n); // kiem tra so chinh phuong
int notcp(int a[], int n); // tra ve cho ham main in ra
void sort(int a[],int n);//sau khi sap xep hien thi ngay trong ham con
void menu(void);
// Define main function
void main()
{
int choice,i,n,p[100];
clrscr();
do
{
clrscr();
menu();
scanf("%d",&choice);
switch(choice)
   {
   case 1: input(p,&n); getch(); break;
   case 2: show(p,n);
      printf("\nThe largest negative number is: %d",maxne(p,n));
      getch(); break;
   case 3: show(p,n);
      printf("\nHas [%d] number that is not square number.",notcp(p,n));
      getch(); break;
   case 4: show(p,n);sort(p,n); getch(); break;
   case 5: exit(0);
   }
} while(choice!=5);
getch();
}
//// Define functions ////
//define menu function
void menu(void)
{
   printf("\n1. Input N and array of integer");
   printf("\n2. Find the largest negative number value");
   printf("\n3. Count the number that is not square numbers");
   printf("\n4. Sort all elements by decending and display them");
   printf("\n5. Exit");
   printf("\n  Pleases enter your choice !");
}
//Define input function
void input(int a[],int *n)
{
   int i;
   printf("N= ");
   scanf("%d",n);
   for(i=0;i<*n;i++)
   {
      printf("a[%d]= ",i);
      scanf("%d",&a[i]);
   }

}
// Define show function
void show(int a[],int n)
{
   int i;
   printf("\nInput array:");
   for(i=0;i<n;i++)
      printf("%5d",a[i]);
}
// Define function to find the largest negative number
int maxne(int a[],int n)
{
   int i,j,am,kt=0;
   for(i=0;i<n;i++)
   {
      if(a[i]<0)
      {
         am=a[i];
         kt++;
         break;
      }
   }
   for(j=i+1;j<n;j++)
   {
      if(a[j]<0 && a[j]>am) am=a[j];
   }
   if(kt)    return am;
   return 0;
}
// define check square number function
int checkcp(int n)
{
   int i,kt=0;
//   if(n<0) return 0;
   for(i=1;i<=n;i++)
      if(i*i==n) kt++;
   if(kt)   return 1;
   return 0;
}
// define count number that not square number function
int notcp(int a[],int n)
{
   int dem=0,i,j;
   for(i=0;i<n;i++)
   {
      if(checkcp(a[i])==0) dem++;
   }
   if(dem==0) return 0;
   return dem;

}
// define sort function
void sort(int a[],int n)
{
   int i,j,temp;
   for(i=0;i<n-1;i++)
      for(j=i+1;j<n;j++)
      {
         if(a[j]>a[i])
         {
         temp=a[i];
         a[i]=a[j];
         a[j]=temp;
         }
      }
printf("\n");
for(i=0;i<n;i++)
   printf("%5d",a[i]);
}

/* Question 2
Write a program to accept one string, after that count the number of words
and trim all space character at the last of string (you must print length
of string before and after trim).
the program must be divided into three modules which do the followings:
- Accept one string from user's input
- Count the number of words
- Trim all space character at the last of string
(you must be printf length of string before and after trim).*/

#include<conio.h>
#include<stdio.h>
#include<string.h>
void input(char a[]);
int count(char a[]);
void cuts(char a[]);
// Define main function
void main()
{
   char str[100];
   clrscr();
   input(str);
   printf("Numbers of words is: %d",count(str));
   cuts(str);
getch();
}
// Define function
// Define input function
void input(char a[])
{
   printf("Input string:");
   fflush(stdin);
   gets(a);
}
// Define count function
int count(char a[])
{
   int i,j,n,dem;
   n=strlen(a);
   for(i=0,dem=0; i<n; i++)
      if(a[i]!=' '&& a[i]!='\t')
      {
         for(j=i+1;j<n;j++)
         {
            if(a[j]!=' '&& a[j]!='\t'&& a[j]!='\0')
            continue;
            else
            {
               dem++;
               i=j;
               break;
            }
         }
      }
   return dem;
}
// Define Cuts function
void cuts(char a[])
{
   int i,n;
   n=strlen(a);
   printf("\nLength of string before trim: %d",n);
   for(i=n-1;i>=0;i--)
      if(a[i]==' '|| a[i]=='\t')   a[i]='\0';
      else break;
   printf("\nString after trim: ");
   puts(a);
   printf("Length of string after trim: %d",strlen(a));
}