Compiled error: ([Warning] unknown scape sentence "\ 040 [enabled by default])"

I'm trying to solve some c ++ exercises in devc ++ and when I print on the screen with prinft I get an error that says:

([Warning]unknown scape sentence "0 [enabled by default])".

It appears in the code:

#include<stdio.h>

using namespace std;

int main (){

    int dos,cuatro;
    float uno,f_cuatro;

    // ...

    printf("\n1/3 %2f\valor maximo %d\tres numeros %d\%d\%d\entero y flotante %d\ %f,"uno, dos, 20, 30, 40, 50, 54.005);    

    return 0;

}