How do I detect a quoted substring in a string?

am trying to determine if a string contains a quoted substring.
This is my code that gives me a compile error: "ai3.cpp:162:37: warning: character constant too long for its type"

Code:

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                //if the line contains 'class="wikitable"'
                string findString = 'class="wikitable"';
                       
                size_t pos = str.find(findString);
                if (pos != string::npos) {
                        cout << "Substring found at position " << pos << endl;
                }

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I've tried:

Code:

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"'class=\"wikitable\"'"

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but str.find doesn't find my substring.

So, can anyone suggest how I may search for the presence of a quoted substring?

And what does the str.find return?

> This is my code that gives me a compile error: "ai3.cpp:162:37: warning: character constant too long for its type"
The outer string needs to be in double quotes, and the inner ones escaped.

Like so

Code:

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string findString = "class=\"wikitable\"";

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This isn't Python, where '' and "" are equivalent.

or you can use raw strings

Code:

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#include <iostream>
#include <string>

int main() {
        const std::string findString { R"(class="wikitable")" };

        std::cout << findString << '\n';
}

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which displays:

Code:

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class="wikitable"

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