>>116
float a(float x, float y);
float b(float x, float y)

main()
{
float x=0,y=0;
x=a();
y=b();
return 0;
}

float a(float x, float y)
{
return sqrt(x*x+y*y)
}

float b(float x,float y)
{
return atan2(x+y)
}