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Lab 16.03.22/lab_3.cpp

+#include <iostream>
+#include <cmath>
+using namespace std;
+const double pi = 3.14;
+
+long double f(long double x);
+{
+    return sin(x)*cos(x)/(5  + x);
+}
+long double  left(long double t0, long double tk,long double h,
+                  long double (*func)(long double))
+{
+    int n=ceil ((tk-t0)/h);
+    long  double result =0.0;
+
+    for (int i=0;i<n-1;i++)
+    {
+        result +=func(t0+i*h);
+    }
+    return result;
+}
+int main()
+{
+    cout<< left (0, pi, 0.0001,f)<< endl;
+    return 0;
+}