C :: Getting Null Pointers In Most Of Functions

For some reason I keep getting null pointers in most of my functions, and in my convertTime function the numbers are way higher than they should be.

Code:

//Utils.H header file----------------------------------------------

//This function takes the radius of a circle and returns the diameter, the circumference and the area.
int circleStatistics(double radius, double *diameter, double *circumference, double *area);

//This function takes a number of days and returns how many years, weeks and remaining days that is.
int convertTime(int days, int *y, int *w, int *d);

//This function takes a length of time and calculates the dilation of that time at a percentage of the speed of light.
int lorentzTimeDilation(double normalTime, double percentC, double *dilatedTime);

[Code] ....