diff --git a/sphere.cc.gcov b/sphere.cc.gcov
deleted file mode 100644
index df2f123..0000000
--- a/sphere.cc.gcov
+++ /dev/null
@@ -1,103 +0,0 @@
-        -:    0:Source:/Users/chenyuehon/gitRepos/gtest_exercise/src/sphere.cc
-        -:    0:Graph:/Users/chenyuehon/gitRepos/gtest_exercise/build/src/CMakeFiles/sphere.dir/sphere.cc.gcno
-        -:    0:Data:/Users/chenyuehon/gitRepos/gtest_exercise/build/src/CMakeFiles/sphere.dir/sphere.cc.gcda
-        -:    0:Runs:1
-        -:    1:#include "sphere.h"
-        -:    2:
-        -:    3:#include <cmath>
-        -:    4:#include <iostream>
-        -:    5:using namespace std;
-        -:    6:
-       1*:    7:Sphere::Sphere() {
-       1*:    8:    this->orig_x = 0.0;
-       1*:    9:    this->orig_y = 0.0;
-       1*:   10:    this->orig_z = 0.0;
-       1*:   11:    this->radius = 0.0;
-       1*:   12:}
-------------------
-_ZN6SphereC1Ev:
-        1:    7:Sphere::Sphere() {
-        1:    8:    this->orig_x = 0.0;
-        1:    9:    this->orig_y = 0.0;
-        1:   10:    this->orig_z = 0.0;
-        1:   11:    this->radius = 0.0;
-        1:   12:}
-------------------
-_ZN6SphereC2Ev:
-    #####:    7:Sphere::Sphere() {
-    #####:    8:    this->orig_x = 0.0;
-    #####:    9:    this->orig_y = 0.0;
-    #####:   10:    this->orig_z = 0.0;
-    #####:   11:    this->radius = 0.0;
-    #####:   12:}
-------------------
-        -:   13:
-       1*:   14:Sphere::Sphere(float ox, float oy, float oz, float rad) {
-       1*:   15:    this->orig_x = ox;
-       1*:   16:    this->orig_y = oy;
-       1*:   17:    this->orig_z = oz;
-       1*:   18:    if (rad >= 0)
-       1*:   19:        this->radius = rad;
-        -:   20:    else
-    #####:   21:        this->radius = 0;
-       1*:   22:}
-------------------
-_ZN6SphereC1Effff:
-        1:   14:Sphere::Sphere(float ox, float oy, float oz, float rad) {
-        1:   15:    this->orig_x = ox;
-        1:   16:    this->orig_y = oy;
-        1:   17:    this->orig_z = oz;
-        1:   18:    if (rad >= 0)
-        1:   19:        this->radius = rad;
-        -:   20:    else
-    #####:   21:        this->radius = 0;
-        1:   22:}
-------------------
-_ZN6SphereC2Effff:
-    #####:   14:Sphere::Sphere(float ox, float oy, float oz, float rad) {
-    #####:   15:    this->orig_x = ox;
-    #####:   16:    this->orig_y = oy;
-    #####:   17:    this->orig_z = oz;
-    #####:   18:    if (rad >= 0)
-    #####:   19:        this->radius = rad;
-        -:   20:    else
-    #####:   21:        this->radius = 0;
-    #####:   22:}
-------------------
-        -:   23:
-        6:   24:float* Sphere::getOrigin() {
-        6:   25:    float* result = new float[3]{this->orig_x, this->orig_y, this->orig_z};
-        6:   26:    return result;
-        -:   27:}
-        -:   28:
-        2:   29:float Sphere::getRadius() {
-        2:   30:    return this->radius;
-        -:   31:}
-        -:   32:
-        1:   33:void Sphere::setOrigin(float ox, float oy, float oz) {
-        1:   34:    this->orig_x = ox;
-        1:   35:    this->orig_y = oy;
-        1:   36:    this->orig_z = oy;
-        1:   37:}
-        -:   38:
-        1:   39:void Sphere::setRadius(float rad) {
-        1:   40:    this->radius = 0;
-        1:   41:}
-        -:   42:
-    #####:   43:bool Sphere::intersect(Sphere& other) {
-    #####:   44:    float dist = sqrt(pow(this->orig_x - other.orig_x, 2) + pow(this->orig_y - other.orig_y, 2) + pow(this->orig_z - other.orig_z, 2));
-    #####:   45:    return true;
-        -:   46:}
-        -:   47:
-    #####:   48:float Sphere::SurfaceArea() {
-    #####:   49:    return 4 * M_PI * pow(this->radius, 2);
-        -:   50:}
-        -:   51:
-    #####:   52:float Sphere::Volume() {
-    #####:   53:    return (4 / 3) * M_PI * pow(this->radius, 2);
-        -:   54:}
-        -:   55:
-    #####:   56:ostream& operator<<(ostream& os, const Sphere& sphere) {
-    #####:   57:    os << "[( " << sphere.orig_x << ", " << sphere.orig_y << ", " << sphere.orig_z << "), " << sphere.radius << "]";
-    #####:   58:    return os;
-        -:   59:}