5. Consider the following statement: string str = \"Now is the time for the part
ID: 3841617 • Letter: 5
Question
5. Consider the following statement:
string str = "Now is the time for the party!";
What is the output of the following statements? (Assume that all parts are independent of each
other.)
a. cout << str.size() << endl;
b. cout << str.substr(7, 8) << endl;
c. string::size_type ind = str.find('f');
string s = str.substr(ind + 4, 9);
cout << s << endl;
d. cout << str.insert(11, "best ") << endl;
e. str.erase(16, 14);
str.insert(16, "to study for the exam?");
cout << str << endl;
Explanation / Answer
The outputs of the statements are as follows:
a. 30
Explanation – it just prints the total size of the string str in bytes.
b. the time
Explanation – substr(7,8) means accessing a substring of 8 bytes starting from the 7th byte.
c. the party
Explanation - str.find('f') finds the character ‘f’ and stores its index value in ‘ind’. Then a new string ‘s’ is created to store the substring of str of 9 bytes starting from the ‘ind+4’ position in str i.e., from ‘t’.
d. Now is the best time for the party!
Explanation - str.insert(11, "best ") inserts “best” string starting from the 11th byte of the string str.
e. Now is the time to study for the exam?
Explanation - str.erase(16, 14) erases 14 characters from str starting from the 16th byte. Then the string “to study for the exam?” is inserted starting from the 16th byte.