WenhaoCui_6153876930_HW1_Q3

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#include <iostream> #include <cstdlib> #include <ctime> #include <cmath> using namespace std; void printStars(int n) { for(int i=0;i < n;i++) { cout << "*"; } cout << endl; }/// printStars() void pareto(int N, double a){ srand(5); double largestVal = -10000000, smallestVal = 10000000; double arr[10]={0,0,0,0,0,0,0,0,0,0}; for(int i=0;i<N;i++){ double r = ((double)rand())/RAND_MAX; double value = 1/(pow(r,1/a)); if (value > largestVal){ largestVal = value; } if(value < smallestVal){ smallestVal = value; } } for(int i=0;i<N;i++){ double r = ((double)rand())/RAND_MAX; double p = 1/(pow(r,1/a)); double pNorm = (p - smallestVal)/(largestVal - smallestVal); int n = floor(pNorm*10); switch (n){ case 0: arr[0]++; break; case 1: arr[1]++; break; case 2: arr[2]++; break; case 3: arr[3]++; break; case 4: arr[4]++; break; case 5: arr[5]++; break; case 6: arr[6]++; break; case 7: arr[7]++; break; case 8: arr[8]++; break; case 9: arr[9]++; break; default: arr[9]++; break; } } for(int i=0; i<10; i++){ int nAsterisks = floor(100 * arr[i]/N); printStars(nAsterisks); } } int main() { pareto(300, 1.24); return 0; }
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