Here we’ll discuss about different techniques how we can swap two numbers. Swapping two numbers means exchanging the values of two variables. For example, if value of A is 5 and value of B is 10, then after swapping values of A and B would be 10 and 5 respectively. Swap Two Numbers Using Third … Continue reading “C Program to Swap Two Numbers”
Category: Programming
C Program to Reverse a Linked List
Reversing a linked list means re-arranging the next (connection) pointers. Head will point to the last node and the first node will point to NULL. Direction of other next pointers will change. If a linked list looks like this: After reversal, it will look like: Logic to Reverse a Linked List Take the first node … Continue reading “C Program to Reverse a Linked List”
C Program to Count Characters, Words and Lines in a File
To get a quick summary of a file like total number of characters, words and limes, Linux already has a tool, wc. Here we’ll see how to write C program to get the similar information. Strategy to Count Characters, Words, Lines in a File Take input of a file name and open that file in … Continue reading “C Program to Count Characters, Words and Lines in a File”
C Program to Count Words in a String
For our purpose, a word is a set of consecutive characters without any white-space. For example, ‘qnaplus‘ is a word but ‘qna plus‘ has two words. Here we’ll see how to write C program to count the number of words in a string. We can think of a simple solution of counting the white spaces … Continue reading “C Program to Count Words in a String”
Count Occurrences of a Substring in a String in C
Here we’ll see how to find out the number of occurrences of a substring in a string. C string library (<string.h>) provides a function (strstr()) to check the presence of a substring. But it does not give you the number of instances of the substring inside a string. We’ll implement our own function with and … Continue reading “Count Occurrences of a Substring in a String in C”