Hackerrank Problem Solution: playing with characters | Hacker rank playing with characters solution
The "Playing with Characters" problem on HackerRank is a basic exercise designed to help you familiarize yourself with the input/output (I/O) operations in C programming, particularly handling characters and strings. While the problem may seem simple, it's crucial for beginners to understand how C handles different types of data, especially when dealing with strings, character arrays, and standard input/output functions.
Problem Statement:
You are given three lines of input:
A single character.
A string (without spaces).
A string (with spaces).
Your task is to read these inputs and then output them in the same order they were received.
Understanding Input and Output in C:
Character Input: In C, individual characters can be read using functions like scanf() with the format specifier %c. This allows the program to capture a single character from the user’s input.
String Input (without spaces): A string in C is essentially an array of characters. When reading strings, scanf() with the %s format specifier is typically used. However, the %s specifier reads only up to the first whitespace character, meaning it can capture strings without spaces.
String Input (with spaces): To handle strings that include spaces, C requires a more flexible input method. One of the common ways to do this is by using the scanf() function combined with format specifiers like %[^\n], which instructs the program to read all characters until a newline (\n) is encountered.
Approach to the Solution:
Reading the Input:
First, you need to read the single character input. This can be done using scanf("%c", &ch); where ch is a character variable.
Next, read the string without spaces using scanf("%s", str1);, where str1 is a character array.
To read the string with spaces, you can use scanf(" %[^\n]%*c", str2);, where str2 is a character array. The scanf() function with this format specifier will read the entire line, including spaces, until it encounters a newline character.
Printing the Output: After reading all the inputs, print them in the same order they were received:
Use printf("%c\n", ch); to print the character.
Use printf("%s\n", str1); to print the string without spaces.
Use printf("%s\n", str2); to print the string with spaces.
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