1118

#include<stdio.h>
int main()
{
    double a,n,count=0,sum=0;
    int i;
    while(1)
    {
        scanf("%lf",&n);


        if(n>=0 && n<=10)
        {
            count++;
            sum=sum+n;
        }
        else
        {
            printf("nota invalida\n");
        }
         if(count==2)
             break;

    }
    printf("media = %0.2lf",sum/2.00);

    while(1)
    {


        scanf("%d",&a);
        printf("novo calculo (1-sim 2-nao)\n");
        if(a==1 || a==2)
            break;

    if(a==1)
        continue;
    else if(a==2)
        break;

    }

return 0;
}