1118

#include<stdio.h>
main()
{

    int x=1;
    double a,s=0;
    int c=0;
    r: s=0;
    c=0;
    if(x==1)
    {
        while(c<2)
        {
            scanf("%lf",&a);
            if(a>=0&&a<=10)
            {
                c++;
                s=s+a;
            }
            else
                printf("nota invalida\n");
        }
        printf("media = %.2f\n",s/2);

    }

   f: printf("novo calculo (1-sim 2-nao)\n");
    scanf("%d",&x);

   if(x==1)
        goto r;
     else if(x==2)
        goto h;
    else
            goto f;
    h:return 0;
}