C Programming slip 26

C Programming BCA Practical Slips Solution

Slip 26

Q1. Write a C program to calculate length of string without using standard functions.

[15 Marks]

#include <stdio.h>

int main()

{

    char s[1000];

    int i;

    printf("Enter a string: ");

    scanf("%s", s);

    for(i = 0; s[i] != '\0'; ++i);

    printf("Length of string: %d", i);

    return 0;

}

Q2. Write a program to display the elements of an array containing n integers in the

 Reverse order using a pointer to the array. [25 Marks]

#include<stdio.h>

void main() 

{   int size, i, arr[30];

   int *ptr;

    ptr = &arr[0];

   printf("\nEnter the size of array : ");

   scanf("%d", &size);

   printf("\nEnter %d integers into array: ", size);

   for (i = 0; i < size; i++) {

      scanf("%d", ptr);

      ptr++;

   }

   ptr = &arr[size - 1];

   printf("\nElements of array in reverse order are :");

    for (i = size - 1; i >= 0; i--) {

      printf("\nElement%d is %d : ", i, *ptr);

      ptr--;

   }

    getch();

}