C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

exprtk_simple_example_03.cpp

@@ -25,6 +25,7 @@ template <typename T>
 void polynomial()
 {
    std::string expression_string = "25x^5 - 35x^4 - 15x^3 + 40x^2 - 15x + 1";
+
    T r0 = T(0);
    T r1 = T(1);
    T  x = T(0);
@@ -39,6 +40,7 @@ void polynomial()
    parser.compile(expression_string,expression);
 
    const T delta = T(1.0 / 100.0);
+
    for (x = r0; x <= r1; x += delta)
    {
       printf("%19.15f\t%19.15f\n",x,expression.value());

exprtk_simple_example_04.cpp

@@ -69,7 +69,9 @@ void fibonacci()
    for (std::size_t i = 0; i < 40; ++i)
    {
       x = i;
+
       T result = expression.value();
+
       printf("fibonacci(%3d) = %10.0f\n",
              static_cast<int>(i),
              result);

exprtk_simple_example_08.cpp

@@ -66,6 +66,7 @@ void composite()
                 error.diagnostic.c_str(),
                 expression_string.c_str());
       }
+
       return;
    }
 

exprtk_simple_example_09.cpp

@@ -118,9 +118,11 @@ void primes()
    for (std::size_t i = 0; i < 100; ++i)
    {
       x = i;
+
       T result1 = expression1.value();
       T result2 = expression2.value();
       T result3 = expression3.value();
+
       printf("%03d  Result1: %c  Result2: %c  Result3: %c\n",
              static_cast<unsigned int>(i),
              (result1 == T(1)) ? 'T' : 'F',