diff options
| -rw-r--r-- | ee1301/wk3/hw3_directory/strap012_HW3A.cpp | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/ee1301/wk3/hw3_directory/strap012_HW3A.cpp b/ee1301/wk3/hw3_directory/strap012_HW3A.cpp index 55e8f6c..8d75294 100644 --- a/ee1301/wk3/hw3_directory/strap012_HW3A.cpp +++ b/ee1301/wk3/hw3_directory/strap012_HW3A.cpp @@ -17,10 +17,11 @@ using namespace std; int spin_the_wheel(int d, int w) { int spinOG=0, spinNew=0, win=0; - for (int i=1; i<=w; i++) { + //spinOG = ( (rand() % d) + 1); + for (int i=0; i<w; i++) { spinOG = ( (rand() % d) + 1); spinNew = ( (rand() % d) + 1); - if (spinOG==spinNew) { + if (spinOG==spinNew) { win++; } } @@ -30,20 +31,24 @@ int spin_the_wheel(int d, int w) { return 0; } } + int main () { - srand(time(NULL)); - long n = 0; - int m = 0; - float test; - int w = 3; - int d = 9; - for (n; n <= 1000000; n++) - { - test = spin_the_wheel(d, w); - m+=test; + srand(10000); + int w, d, m, test; + for (w=3; w<=6; w++) { + m=0; + for (d=9; d<=27; d++) { + m=0; + for (long n=1000000; n>0; n--) { + int test = spin_the_wheel(d, w); + m+=test; + } + double win=m; + cout << fixed << setprecision(5) + << "w=" << w << ", d=" << d + << ": Simulated probability = m/n = " << (win / 1000000.0) * 100.0 << "%. " + << "Theoretical probability = " << (d / (pow(d, w))) * 100 << "%." << endl; + d+=2; + } } - - cout << "w=" << w << ", d=" << d; - cout << ": Simulated probability = m/n = " << (m/n)*100 << "%. "; - cout << "Theoretical probability = " << (d/(pow(d,w)))*100 << "%." << endl; }
\ No newline at end of file |