Playing with Characters – HackerRank Solutions

Playing with Characters – HackerRank Solutions

Problem statement

Objective:

This challenge will help you to learn how to take a character, a string and a sentence as input in C.
To take a single character ch as input, you can use scanf(“%c”, &ch ); and printf(“%c”, ch) writes a character specified by the argument char to stdout

char ch;
scanf(“%c”, &ch);
printf(“%c”, ch);
This piece of code prints the character ch.

You can take a string as input in C using scanf(“%s”, s). But, it accepts string only until it finds the first space.

In order to take a line as input, you can use scanf(“%[^\n]%*c”, s); where s is defined as char s[MAX_LEN] where MAX_LEN is the maximum size of s. Here, [] is the scanset character. ^\n stands for taking input until a newline isn’t encountered. Then, with this %*c, it reads the newline character and here, the used * indicates that this newline character is discarded.

Note: The statement: scanf(“%[^\n]%*c”, s); will not work because the last statement will read a newline character, \n, from the previous line. This can be handled in a variety of ways. One way is to use scanf(“\n”); before the last statement.

Task:

You have to print the character, ch, in the first line. Then print s in next line. In the last line print the sentence, sen.

Input Format:

First, take a character, ch as input.
Then take the string, s as input.
Lastly, take the sentence sen as input.

Constraints:

Strings for s and sen will have fewer than 100 characters, including the newline.

Output Format:

Print three lines of output. The first line prints the character, ch.
The second line prints the string, s.
The third line prints the sentence, sen.

C
Language
Welcome To C!!

Sample Output

C
Language
Welcome To C!!

Solution

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#define MAX_LEN 128

int main() 
{
    char ch;
    char word[MAX_LEN];
    char sen[MAX_LEN];
    
    scanf("%c", &ch);
    scanf("%s\n", word);
    scanf("%[^\n]%*c", sen);
    
    printf("%c\n", ch);
    printf("%s\n", word);
    printf("%s\n", sen);

    return 0;
}

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