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Strings

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"

Try the following example in the editor below.

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 three lines:

  • First line print two space-separated integers, representing the length of A and B respectively.
  • Second line print the string produced by concatenating A and B (A+B).
  • 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
Start solving Strings on Interview Code Editor
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