Question

Part 1:

Determine what is wrong (if any) with the following statements

1. int A[4] = { 1, 2, 3, 4, 5};
2. int A[4] = {1,2};
3. int A[4] = [1,2,3,4];

Part 2:

Create one dimensional array and save the following integers in it:  2, 3, 6, 7, 10, 12. Display the values on the screen. (for example, a[0] = 2, a[1] = 3, etc.)

Part 3:

Write a program to read 5 integers from the user. Save these integers in an array and display the following on screen:

1. The entered values
2. The average value

Part 4:

Create a function that will do the following (when called):

Generate 5 random numbers between 1 – 10. (Hint: use rand() function)

Save the random numbers in an array (Hint: create an array)

Display these numbers on the screen by reading them from the saved array.

Answer 1

Part 1:

1. int A[4]={1,2,3,4,5}; -> This will give us error because the array is declared with size 4 but five elements are given. So the array cannot initialize the number 5.
2. int A[4] = {1,2}; -> This will not cause any error. Though the size is declared 4, the remaninig elements will be 0. The array will be {1,2,0,0}
3. int A[4] = [1,2,3,4]; -> The initialization is wrong here. This is not the correct syntax for initialization. Use curly braces {} instead of brackets.

Part 2:

#include <stdio.h>

int main()
{
   int a[6]={2,3,6,7,10,12};  //single dimension array declared and initialized with the given values
    printf("The values of array a[] are: ");
    for(int i=0;i<6;i++)
    {
       printf("%d ",a[i]);//printing the array values
    }

    return 0;
}

Output: The values of array a[] are: 2 3 6 7 10 12

Part 3:

#include <stdio.h>

int main()
{
    int a[5],i,sum=0;  //single dimension array declared with size 5
    double average;
    printf("Input the 5 values one by one : \n");
    for(i=0;i<5;i++)
    {
        scanf("%d",&a[i]); //Input the array values
    }
    printf("Entered 5 values are : \n");
    for(i=0;i<5;i++)
    {
        printf("%d ",a[i]); //Input the array values
    }
    printf("\n"); //new line
    for(i=0;i<5;i++)
    {
        sum=sum+a[i]; //add all the values in array to sum
    }
    average=sum/5; //calculate average
    printf("The average of all the 5 values is: %.2f ",average);
    return 0;
}

Output: The ouput for the above code is,

Input the 5 values one by one :
1
2
3
4
5
Entered 5 values are :
1 2 3 4 5
The average of all the 5 values is: 3.00

Part 4:

#include <stdio.h>
#include<time.h>
#include<stdlib.h>
void generate()
{
    int a[5],i;
    printf("Generating 5 random values between 1 and 10\n");
    for(i=0;i<5;i++)
    {
        a[i]=rand()%10+1; //here we generate random values between 1 and 10 using rand() function and store them in array
    } 
    printf("Values generated and stored in array\n");
    printf("Displaying the random generated values: ");
    for(i=0;i<5;i++)
    {
        printf("%d ",a[i]); //display the random values
    }
}
int main()
{   srand(time(0));  //this will give the rand() a new seed so that you will get newly generated random values every time. If you dont use this you will get the same values every time you execute the program.
    generate(); //call the generate() function
    return 0;
}

Output:

Generating 5 random values between 1 and 10
Values generated and stored in array
Displaying the random generated values: 4 7 8 6 4

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