Practice Programs

  • Doing Programs gives you the great understanding about what you have learned.
  • Doing Programs gives you the Confidence.
  • So let's Start by doing some programming.
  • Q:Declare a integer array of 10 element and initialize  it by some integer values and calculate its mean?
    Solution:

    #include<stdio.h>

void main()
{

    int marks[15]={63,65,48,95,45,48,78,65,23,78,78};
    int i,sums=0;  //initialization of sums variable to zero,
    float mean;    // because it should not start with any garbage value.
    for(i=0;i<11;i++)
    {
        sums = sums + marks[i];  //at every iteration assigning (current value + new_element) to new sums variable
    }
    mean = sums/11;  

    printf("\nMean of marks array is %f",mean);
}

    Output:

    Mean of marks array is 62.0000
  • Q:Declare a integer array and take no of elements and their value from the user, and only print even numbers ?
    Solution:

    #include<stdio.h>

void main()
{
    int i,n;
    int arr[20];
    printf("enter the number of elements:");
    scanf("%d",&n);

    //taking array element as input from the user.
    for(i=0;i<i++)
    {   printf("Enter the element:");
        scanf("%d",&arr[i]);
    }

    //printing even numbers
    printf("Even numbers  are:");
    for(i=0;i<i++)
    {    //iterating   through all values of 'arr' array
        if(arr[i] % 2 ==0) //checking array element is even or not
        {             //as you know that '%' operator gives remainder
                      //if remainder is 0 than number is even number otherwise
                      //number is odd.
            printf("%d\t",arr[i]);
        }
    }
}

    Output:

    enter the number of elements:6

    enter the number of elements:1
    enter the number of elements:2
    enter the number of elements:3
    enter the number of elements:4
    enter the number of elements:5
    enter the number of elements:6


    Even numbers are:2    4    6

    Exercise:

    Q:Declare a integer array and take no of elements and their value from the user, and only print odd numbers ?
  • Q:Declare a integer array and take no of elements and their value from the user, and print the maximum value?
    Solution:

    #include<stdio.h>

void main()
{
    int i, n, maxs=0;
    int arr[20];
    printf("enter the number of elements:");
    scanf("%d",&n);

    //taking array element as input from the user.
    for(i=0;i<i++)
    {   printf("Enter the element:");
        scanf("%d",&arr[i]);
    }

    //printing even numbers
    for(i=0;i<i++)
    {    //iterating   through all values of 'arr' array
        if(arr[i] > maxs) //checking array element is greater than max variable
        {             //if element is greater than max value than,
                        //we are assigning that value to the max variable.
            maxs = arr[i];
        }
    }
    printf("%d is a maximum value.",maxs);
}

    Output:

    enter the number of elements:6

    enter the number of elements:10
    enter the number of elements:20
    enter the number of elements:30
    enter the number of elements:40
    enter the number of elements:50
    enter the number of elements:60


    60 is a maximum value.

    Exercise:

    Q:Declare a integer array and take no of elements and their value from the user,and print the minimum value?
  • Q:Declare  2-dimensional integer arrays and initialize them with some value and do their addition and assign that result to another 2-dimensional array?
    Solution:


    #include<stdio.h>

void main()
{   int i,j;
    int array1[3][3] = {{1,2,3},
                        {4,5,6},         //decleration and initializing the 2-d array
                         {7,8,9}};
                         
                         
                         
     int array2[3][3] = {{11,12,13},
                      {14,15,16},       //decleration and initializing the 2-d array
                         {7,8,9}};
                      {17,18,19}};

    int result[3][3];


    for(i=0; i<3 ;i++)
    {
        for(j=0;j<3;j++)
        {    // at every iteration adding elements of both array of index i_th row and j_th column
            //and assigning to result array at index i_th row and j_th column.
            result[i][j] = array1[i][j] + array2[i][j];
        }
    }
    
    
    
    //printing array result.
    printf("Addition of two matrix is :")
     for(i=0; i<3 ;i++)
    {
        for(j=0;j<3;j++)
        {
            printf("%d\t",result[i][j]);
        }
        printf("\n");
    }
}

    Output:

    Addition of two matrix is :
       12    14    16
       18    20    22
       24    26    28

    Exercise:

    Q:Declare  2-dimensnional integer arrays and initialize them with some value and do their Subtraction and assign that result to another 2-dimensional array?





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