EX-21-POINTERS

AIM:

Write a C program to convert a 23.65 into 25 using pointer

ALGORITHM:

1. Declare a double variable to hold the floating-point number (23.65).
2. Declare a pointer to double to point to the address of the variable.
3. Use the pointer to modify the value to 25.0.
4. Print the modified value.

PROGRAM:

#include <stdio.h>

int main() {
    float num = 23.65;
    float *ptr = &num;

    *ptr = 25.0;

    printf("Converted value: %.0f\n", num);
    return 0;
}

OUTPUT:

RESULT:

Thus the program to convert a 23.65 into 25 using pointer has been executed successfully.

EX-22-FUNCTIONS AND STORAGE CLASS

AIM:

Write a C program to calculate the Product of first 12 natural numbers using Recursion

ALGORITHM:

1. Define a recursive function calculateProduct that takes an integer parameter n.
2. Return n multiplied by the result of the calculateProduct function called with n - 1.
3. Declare an integer variable n and an unsigned long long variable product.
4. Initialize n with the value 12 (for the first 12 natural numbers).
5. Call the calculateProduct function with n and store the result in the product variable.
6. Print the result, indicating it is the product of the first 12 natural numbers.

PROGRAM:

#include <stdio.h>

long long product(int n) {
    if (n == 1)
        return 1;
    else
        return n * product(n - 1);
}

int main() {
    int n = 12;
    long long result = product(n);
    printf("Product of first 12 natural numbers: %lld\n", result);
    return 0;
}

OUTPUT:

RESULT:

Thus the program has been executed successfully.

EX-23-ARRAYS AND ITS OPERATIONS

AIM:

Write C Program to find Sum of each row of a Matrix

ALGORITHM:

1. Declare and initialize the matrix with the desired values.
2. Create a loop to iterate through each row of the matrix.
3. Inside the loop, calculate the sum of the elements in each row.
4. Print the sum for each row.

PROGRAM:

#include <stdio.h>

int main() {
    int a[10][10], r, c, i, j, sum;

    printf("Enter number of rows: ");
    scanf("%d", &r);
    printf("Enter number of columns: ");
    scanf("%d", &c);

    printf("Enter elements of the matrix:\n");
    for (i = 0; i < r; i++) {
        for (j = 0; j < c; j++) {
            scanf("%d", &a[i][j]);
        }
    }

    printf("\nSum of each row:\n");
    for (i = 0; i < r; i++) {
        sum = 0;
        for (j = 0; j < c; j++) {
            sum += a[i][j];
        }
        printf("Row %d = %d\n", i + 1, sum);
    }

    return 0;
}

OUTPUT

RESULT

Thus the C proggram is executed succesfully.

EX-24-STRINGS

AIM:

Write C program for the below pyramid string pattern. Enter a string: PROGRAM Enter number of rows: 5 P R O G R A M P R O G R A M P R O G R A M

ALGORITHM:

1. Input the number of rows for the pyramid (e.g., num_rows).
2. Initialize variables:i for the row count (starting from 1),j for the character count (starting from 1)
3. Start a loop for i from 1 to num_rows (for each row of the pyramid).
4. Calculate the midpoint position as midpoint = (2 * num_rows - 1) / 2.
5. End the program.

PROGRAM:

#include <stdio.h>

int main() {
   char str[100];
    int rows;
    scanf("%[^\n]",str);
    scanf("%d",&rows);
    
    int len=strlen(str);
    int k=0;
    for(int i=0;i<=rows;i++)
    {
        for(int s=0;s<=rows+1-i;s++)
            printf(" ");
            
        for(int j=0;j<=i;j++)
        {
            printf("%c ",str[k%len]);
            k++;
        }
        printf("\n");
    }
    return 0;
}

OUTPUT

RESULT

Thus the C program to String process executed successfully

.

EX -25 –DISPLAYING ARRAYS USING POINTERS

AIM

Write a c program to read and display an array of any 6 integer elements using pointer

ALGORITHM

Step 1: Start the program. Step 2: Declare the following: • Integer variable i for iteration. • Integer variable n to store the number of elements. • Integer array arr[10] to hold up to 10 elements. • Integer pointer parr and initialize it to point to the array arr. Step 3: Read the value of n (number of elements) from the user. Step 4: Loop from i = 0 to i < n: • Read an integer value and store it in the address parr + i using pointer arithmetic. Step 5: Loop from i = 0 to i < n: • Print the element at *(parr + i) using pointer dereferencing. Step 6: End the program.

PROGRAM

#include <stdio.h>

int main() {
    int arr[6];
    int *ptr;
    int i;

    ptr = arr;

    printf("Enter 6 integer elements:\n");
    for (i = 0; i < 6; i++) {
        scanf("%d", ptr + i);
    }

    printf("\nThe elements you entered are:\n");
    for (i = 0; i < 6; i++) {
        printf("%d ", *(ptr + i));
    }

    printf("\n");
    return 0;
}

OUTPUT

RESULT

Thus the C program to read and display an array of any 6 integer elements using pointer has been executed