View Code of Problem 50

#include <iostream>
#include <string>
using namespace std;

int main()
{
	char s1[100];
	string s2;
	int i, len;
	gets(s1);
	len = strlen(s1);
	if (s1[0] >= '0'&&s1[0] <= '9')
	{
		s2 += s1[0];
	}
	else
	{
		s2 += '*';
	}
	for (i = 1; i < len; i++)
	{
		if (s1[i] >= '0'&&s1[i] <= '9')
		{
			s2 += s1[i];
		}
		else
		{
			if (s1[i - 1] >= '0'&&s1[i - 1] <= '9')
			{
				s2 += '*';
			}
		}
	}
	cout << s2 ;
	return 0;
}
/*
Main.cc: In function 'int main()':
Main.cc:10:2: warning: 'char* gets(char*)' is deprecated (declared at /usr/include/stdio.h:638) [-Wdeprecated-declarations]
  gets(s1);
  ^
Main.cc:10:9: warning: 'char* gets(char*)' is deprecated (declared at /usr/include/stdio.h:638) [-Wdeprecated-declarations]
  gets(s1);
         ^
Main.cc:11:17: error: 'strlen' was not declared in this scope
  len = strlen(s1);
                 ^
*/