I need help with the restrictions

[leoccsvzla]

the question is that I need help entering a figure that is a decimal and restricts

I come from brazil. My english is bad jejeje

  	ErrorEntrada=true;
			while (ErrorEntrada==true)
		{
    
			ErrorEntrada=false;
			cout<<"\n Introduzca su sueldo: "<<endl;
			cin>>s;

			if( cin.fail() || s<=0||isdigit(s))  
			{
				cout << "Error de dato introducido" << endl;
				cin.clear();
				cin.ignore(10000,'\n');
				ErrorEntrada=true;}
		}

[cire]

What type is s?

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