#include <string>
#include <iostream>
#include <iomanip>
 
using namespace std;
 
int is_number(const std::string& s)
{
    for(int count = 0; s.c_str()[count];)
    {
        if (isdigit(s[count]))
            ++count;
        else
            return 0;
    }
    return 1;
}
 
int main(int argc, const char * argv[])
{
    cout << is_number("sdvjv sdgv") << endl;
    cout << is_number("6732587523") << endl;
    cout << is_number("Привет! 67569") << endl;
    cout << is_number("237652347 вот...") << endl;
}
 

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