hi hello how are you hello hi
hi
No. of occurrences of hi is 2
output string is: hello how are you hello
BIRLA INSTITUTE OF TECHNOLOGY & SCIENCE, PILANI (RAJ.)
Second Semester 2019-20 CS F111 Computer Programming
LABORATORY SESSION 10
(Pointers, Pointers to arrays, Multidimensional arrays and Strings)
1. Write a function circleData() which takes as one of its arguments the radius of a circle, and then
computes and makes available in the calling function the area and perimeter of the circle.
2. Write a program to accept an English sentence and an English word from the user, and then to
check whether the word exists in the sentence or not. If it occurs, the program should print out
how many times the word occurs in the sentence and then remove all the occurrences of the word
from the sentence. For taking the input, you have to use input redirection, that is, you have to
create a file named input.txt and then take the input from input.txt instead of the keyboard. A
sample input.txt could be as shown below
input.txt
3. Write a program to find the transpose of a 2D matrix using two functions function1 and function2.
While function1 should accept the original matrix in form of a 2D array as its argument, function2
should accept a pointer to the original matrix as the argument.
4. Implement a function convertLower() to convert a given string into one that contains entirely lower
case letters. The function performs the conversion on the string received as its argument. First
implement your function using ASCII codes only. Next, use the library function tolower() to do the
job. Remember to include the header <ctype.h>. You can learn more about this function by reading
the manual pages.
[Note: There are a suite of useful library functions like tolower() and toupper() available in the ctype
library. Get to know them by typing man isalpha at the shell prompt. You should be familiar with the
first 13 functions – starting from isalnum() and ending with isblank(), whose descriptions are also
provided in the manual page, so you can use them in your programs when needed.]
5. For the piece of codes shown below find out the output. First note down the answer you expect on
your notebook then cross check the answer by executing the code.
a
b.
#include<stdio.h>
void function(char**);
int main()
{
char *arr[] = { "ant", "bat", "cat", "dog", "egg", "fly" };
function(arr);
return 0;
}
void function(char **ptr)
{
char *ptr1;
ptr1 = (ptr += sizeof(int))[-2];
printf("%s\n", ptr1);
}
#include<stdio.h>
int main()
{
printf("%d", sizeof(void *));
return 0;
}
