//1) Write a C program that calculates the maximum, the minimum, and the average of 10 numbers
                //entered by the user and stored in an array.
                #include<stdio.h>

                int main()
                {
                    int arr[10],max,min,sum=0; float av;
                    for(int i=0 ; i<10 ; i++)
                    {
                        printf("enter the number-%d: ",i+1);
                        scanf("%d",&arr[i]);
                        if(i==0)
                        {
                            max=arr[0];
                            min=arr[0];
                        }
                        if(arr[i]>max)
                            max=arr[i];
                        else if(arr[i]<min)
                                min=arr[i];
                        sum+=arr[i];
                    }
                    av=sum/10.0;
                    printf("the average of 10 numbers is %.2f \nthe maximum value is %d \nthe minimum value value is %d",av,max,min);
                    return 0;
                }

                //--------------------------------------------------------------------------------------------------

                //2) Write a C function that checks if an array is in an ascending order.

                //solution 1

                #include <stdio.h>
                const int size;
                void checksascending(int arr[],int size)
                {
                    int value,a;
                    for(int i=0;i<size;i++)
                    {
                        value=arr[i];
                        if(arr[i+1]>value)
                            a=1;
                        else
                        {
                            printf("the array is not in an ascending");
                            return;
                        }
                    }
                    if(a==1)
                        printf("the array is in an ascending");
                }
                int main()
                {
                    printf("enter the number(size) of array: ");
                    scanf("%d",&size);
                    int arr[size];
                    for(int i=0;i<size;i++)
                    {
                        printf("enter the number-%d: ",i+1);
                        scanf("%d",&arr[i]);
                    }
                    checksascending(arr,size);
                }

                //solution 2

                const int size;
                void checksascending(int arr[],int size)
                {
                    int a=0;
                    for(int i=0;i<size-1;i++)
                    {
                        if(arr[i+1]>arr[i])
                            a++;
                        else
                        {
                            printf("the array is not in an ascending");
                            return;
                        }
                    }
                    if(a==size-1)
                        printf("the array is in an ascending");

                }
                int main()
                {
                    printf("enter the number(size) of array: ");
                    scanf("%d",&size);
                    int arr[size];
                    for(int i=0;i<size;i++)
                    {
                        printf("enter the number-%d: ",i+1);
                        scanf("%d",&arr[i]);
                    }
                    checksascending(arr,size);
                }

                //--------------------------------------------------------------------------------------------------

                //3) Write a C program that reads 10 integer numbers from the user, and then the program should
                calculate the sum of the odd numbers, and the sum of the even numbers.
                #include <stdio.h>
                int main()
                {
                    int a[10],sumeven=0,sumodd=0;
                    for(int i ; i<10 ; i++)
                    {
                        printf("enter the number-%d: ",i+1);
                        scanf("%d",&a[i]);
                        if(a[i]%2==0)
                            sumeven+=a[i];
                        else
                            sumodd+=a[i];
                    }
                    printf("'the sum of the odd numbers is %d' and 'the sum of the even numbers is %d'",sumodd,sumeven);
                }

                //--------------------------------------------------------------------------------------------------

                //4) Write a C program that asks the user to enter 10 integers in an array. The program will then
                //display (based on the entered numbers) one of the following messages:
                //● "the numbers in the array are increasing",
                //● "the numbers in the array are decreasing",
                //● "the numbers in the array are not changing", or
                //● "the numbers in the array are increasing and then decreasing."
                #include <stdio.h>
                void message();
                int main()
                {
                    int a[5];
                    for(int i=0 ; i<5 ; i++)
                    {
                        printf("enter the number-%d: ",i+1);
                        scanf("%d",&a[i]);
                    }
                    message(a,5);
                }

                void message(int a[],int size)
                {
                    int b=0;
                    for(int i=0 ; i<size-1 ; i++)
                    {
                        if(a[i+1]>a[i])
                            b++;
                        else if(a[i+1]==a[i])
                        {
                            b++;
                            b--;
                        }
                        else if(a[i+1]<a[i])
                        {
                            b++;
                            b+=1;
                        }
                        else
                            printf("the numbers in the array are increasing and then decreasing.");
                    }
                    if(b==size-1)
                        printf("the numbers in the array are increasing");
                    else if(b==0)
                        printf("the numbers in the array are not changing");
                    else if(b==(size-1)*2)
                        printf("the numbers in the array are decreasing");
                    else
                        printf("the numbers in the array are increasing and then decreasing.");
                }

                //--------------------------------------------------------------------------------------------------

                //5) Write a C program that reads a matrix (3🞨4), and asks the user to choose a number, and then
                //displays the position of the selected number if found, otherwise it displays “number not found.”
                #include <stdio.h>
                int main()
                {
                    int a[3][4],n,b;
                    printf("reads a matrix (3*4): \n");
                    for(int i=0; i<3 ; i++)
                    {
                        for(int j=0; j<4 ; j++)
                        {
                            printf("enter the number'%d-%d': ",i,j);
                            scanf("%d",&a[i][j]);
                        }
                    }
                    printf("choose a number: ");
                    scanf("%d",&n);
                    for(int i=0; i<3 ; i++)
                    {
                        for(int j=0; j<4 ; j++)
                        {
                            if(n==a[i][j])
                            {
                                b=1;
                                printf("the position of the selected number is '%d-%d' \n",i,j);
                            }
                        }
                    }
                    if(b!=1)
                        printf("number not found");
                }