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Strings in C++ HackerRank Solution

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C++ provides a nice alternative data type to manipulate strings, and the data type is conveniently called string. Some of its widely used features are the following:

Declaration:

string a = "abc";

Size:

int len = a.size();

Concatenate two strings:

string a = "abc";
string b = "def";
string c = a + b; // c = "abcdef".

Accessing ith element:

string s = "abc";
char   c0 = s[0];   // c0 = 'a'
char   c1 = s[1];   // c1 = 'b'
char   c2 = s[2];   // c2 = 'c'

s[0] = 'z';         // s = "zbc"

P.S.: We will use cin/cout to read/write a string.

Input Format

You are given two strings, a and b, separated by a new line. Each string will consist of lower case Latin characters ('a'-'z').

Output Format

In the first line print two space-separated integers, representing the length of a and b respectively.

In the second line print the string produced by concatenating a and b (a+b).

In the third line print two strings separated by a space, a’ and b’. a’ and b’ are the same as a and b, respectively, except that their first characters are swapped.

Sample Input

abcd
ef

Sample Output

4 2
abcdef
ebcd af

Explaination

a = “abcd”
b = “ef”
|a| = 4
|b| = 2
a + b = “abcdef”
a’ = “ebcd”
b’ = “af”

Solution

#include <iostream>
#include <string>
using namespace std;

int main() {
	// Complete the program
    string a, b;
    cin >> a >> b;

    cout << a.size() << " " << b.size() << endl;
    cout << a + b << endl;

    char temp = a[0];
    a[0] = b[0];
    b[0] = temp;

    cout << a << " " << b << endl;

    return 0;
}

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Strings in C++ HackerRank Solution

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