#include <stdio.h>

int decim(int n) {
    int i = 1,a;
    int octal = 0;


    if(n<=7) {
        octal=n;
    }

    else {

        while(n>=8) {
            a=n%8;
            n=n/8;
            octal = octal + a * i;
            i*= 10;
        }
        n=n%8;
        octal = octal + n * i;

    }

    return octal;

}


int main() {
    int n,octal;

    printf("Informe um numero decimal:");
    scanf("%d",&n);

    octal=decim(n);

    printf(" o numero octal eh: %d\n",octal);



    return 0;
}