Apple Mach-O Linker ID Error and a Code Sign Error appears. My program (X-Code) tells me there are these errors but it won't tell me where in the code the errors are. Please Help! Thanks!

#include

#include

#include

#define PI 3.14159265

void updatePosition (double pos[],double vel[]);

void updateVelocity (double vel[],const double acc[],const double timeInc[]);

void outputPosition(double pos[]);

const double timeInc = 0.001;

const double initialVelocity = 110;

const double acc[3] = {0,0.25,-9.81};

int main()

{

double pos[3],vel[3];

double elevation = 62.900;

double azimuth = 2.9;

double val = PI / 180.0;

pos[0] =0;

pos[1] =0;

pos[2] =0;

double vel_g = initialVelocity * cos(elevation * val);

double vel_a = initialVelocity * sin(elevation * val);

vel[0] = vel_g * cos(azimuth * val);

vel[1] = vel_g * sin(azimuth * val);

vel[2] = vel_a;

double time =0;

do

{

updatePosition(pos,vel);

updateVelocity(vel,acc,&timeInc);

printf("Time: %0.31f s", time);

outputPosition(pos);

time += timeInc;

}

while(pos[2] >0);

double diff_x=1000 - pos[0];

double diff = diff_x* diff_x;

double distance = sqrt(diff);

printf("Missed by %03.1f m ",distance);

printf("Author: Dalton Farrington");

printf("Azimuth: %03.1f",azimuth);

printf("Elevation angle: %03.1f ", elevation);

return 0;

}

void updatePosition(double pos[],double vel[])

{

pos[0] = vel[0]*timeInc + pos[0];

pos[1] = vel[1]*timeInc + pos[1];

pos[2] = vel[2]*timeInc + pos[2];

}

void updateVelocity(double vel[],const double acc[],const double timeInc)

{

vel[0] = vel[0] + acc[0] * timeInc;

vel[1] = vel[1] + acc[1] * timeInc;

vel[2] = vel[2] + acc[2] * timeInc;

}

void outputPosition(double pos[])

{

printf("X-Pos: %0.31f m", pos[0]);

printf("Y-Pos: %0.31f m", pos[1]);

printf("Height: %03.1f m ",pos[2]);

}