public static float pedir_cantidad_ingreso(){
		float cantidad=0;
		do{
		try{
		BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));
		System.out.print("Importe Ingreso => ");
		cantidad=Float.parseFloat(stdin.readLine());
		}catch(NumberFormatException e){
			System.out.println(e+"Valores numericos enteros o decimales");
		} catch (IOException e) {
			e.printStackTrace();
		}
		}while(cantidad<=0);
		return cantidad;
	}