Anonymous user
Determine if a string is numeric: Difference between revisions
→{{header|C++}}
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=={{header|C++}}==
Using stringstream:
<lang cpp>#include <sstream> // for istringstream
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return ( iss.rdbuf()->in_avail() == 0 );
}
</lang>
Using find:
<lang cpp>
bool isNumeric( const char* pszInput, int nNumberBase )
{
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return (input.find_first_not_of(base.substr(0, nNumberBase)) == string::npos);
}
</lang>
Using all_of (requires C++11)
<lang cpp>
bool isNumeric(std::string input) {
return std::all_of(input.begin(), input.end(), ::isdigit);
}
</lang>
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