Search inside a string

Read first Task 54

`find` returns the position of a piece of text or `string::npos`, and `substr` cuts a section out.

Definition and example

Search inside a string is the focus of this lesson. `find` returns the position of a piece of text or `string::npos`, and `substr` cuts a section out. The task asks you to apply that idea in a small example: Task: Search inside a string. What does this program print. Before you run the code, predict what should happen. Then Inspect the program output and the compiler message if it fails and compare it with your prediction. If the result differs, change one relevant line and run it again. Testing one change at a time makes the cause of a result easier to understand.

C++ 1 automatic check Capstone: structs, maps and errors

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// TASK search-inside-a-string-04: Task: Search inside a string. What does this program print?
// STEPS: Read the explanation. Change one relevant line at a time, then run the code and compare the result with the check on the right.
#include <iostream>
using namespace std;

int main() {
    string email = "aicomputersacademy@gmail.com";
    size_t at = email.find('@');
    // TODO: produce the required output for this task.
    cout << "Domain: " << email.substr(at + 1) << endl;
    return 0;
}

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Your result

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Checks on this task:

The program output must match “User: aicomputersacademy Domain: gmail.com”.

The task and step-by-step instructions are written as comments at the top of the editor. Change one relevant line, run it, and compare the result with these checks.

Incorrect attempts before answer: 0 / 3

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Search inside a string

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