hy guys can you please tell me what s wrong with the folowing code
float a,b,c;
printf("input three numbers:\n");
scanf ("%f%f%f",&a,&b,&c);
float z=sqrt((1/2)*(pow(a,2.0)+pow(b,2.0)+pow(c,2.0))-(3/4)*pow(a,2.0));
printf("res is %f",z);
getch();
return 0;