code:general program

main.cpp

@@ -0,0 +1,79 @@
+#include <iostream>
+#include <vector>
+#include <math.h>
+using namespace std;
+const size_t SCREEN_WIDTH = 80;
+const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+int main()
+{
+    size_t number_count;
+
+    cout << "Enter number count: ";
+    cin >> number_count;
+
+    vector<double> numbers(number_count);
+    numbers.resize(number_count);
+    for(size_t i=0;i<number_count;i++)
+    {
+        cin>>numbers[i];
+    }
+    size_t bin_count;
+    cin>>bin_count;
+    vector<size_t> bins(bin_count);
+    double Max = numbers[0], Min = numbers[0];
+    for (double x : numbers)
+    {
+        if (x < Min)
+        {
+            Min = x;
+        }
+        else if (x > Max)
+        {
+            Max = x;
+        }
+    }
+    double bin_size = (Max - Min) / bin_count;
+    //cout<<" "<<Max<<" "<<Min<<" "<<bin_size<<endl;
+
+    for (size_t i = 0; i < number_count; i++)
+        {
+            bool found = false;
+            for (size_t j = 0; (j < bin_count - 1) && !found; j++)
+            {
+                auto lo = Min + j * bin_size;
+                auto hi = Min + (j + 1) * bin_size;
+                if ((lo <= numbers[i]) && (numbers[i] < hi))
+                {
+                    bins[j]++;
+                    found = true;
+                }
+            }
+            if (!found)
+            {
+                bins[bin_count - 1]++;
+            }
+        }
+    size_t Max_count = bins[0];
+    for(size_t x : bins)
+    {
+        if(x > Max_count)
+        {
+            Max_count = x;
+        }
+    }
+    for(size_t i =0;i< bin_count;i++)
+    {
+        size_t height = bins[i];
+        printf("%3d:",bins[i]);
+        if(Max_count>(MAX_ASTERISK))
+        {
+            height = (MAX_ASTERISK) * (static_cast<double>(bins[i]) / Max_count);
+        }
+        for(size_t j=0;j<height; j++)
+        {
+            cout<<"*";
+        }
+        cout<<endl;
+    }
+    return 0;
+}