#include
                int main()
                {
                    float num_1,num_2;
                    printf("num_1=");
                    scanf("%f",&num_1);
                    printf("num_2=");
                    scanf("%f",&num_2);
                    printf("sum=%f\n",num_1+num_2);
                    printf("average=%f",(num_1+num_2)/2.0);
                
                    return 0;
                }