update config

test/forward/test.cpp

@@ -0,0 +1,41 @@
+#include <cmath>
+#include <iostream>
+#include <autodiff/forward/dual.hpp>
+using namespace autodiff;
+
+dual sqrt1(dual x){
+    dual res = 0.0;
+    res.val = std::sqrt(x.val);
+    if (x.grad !=0.0){
+        std::cout << "x.grad: " << x.grad << std::endl;
+        res.grad += 0.5/res.val*x.grad;
+    }
+    return res;
+}
+dual test_exp(dual x){
+    dual res = 0.0;
+    std::cout << "x.val: " << x.val << std::endl;
+    res.val = std::exp(x.val);
+    std::cout << "res.val: " << res.val << std::endl;
+    std::cout << "res.grad: " << res.grad << std::endl;
+    if(x.grad != 0.0) res.grad += x.grad*res.val;
+    std::cout << "res.val: " << res.val << std::endl;
+    std::cout << "res.grad: " << res.grad << std::endl;
+    return res;
+}
+
+dual test_exp0(dual x){
+    return 1.0+exp(x);
+}
+
+int main()
+{
+    dual x = 1.2;
+    dual u = sqrt1(x);
+    double dfdx = derivative(sqrt1, wrt(x), at(x));
+    double dfdx2 = derivative(test_exp, wrt(x), at(x));
+    double dfdx3 = derivative(test_exp0, wrt(x), at(x));
+    std::cout << "dfdx: " << dfdx << std::endl;
+    std::cout << "dfdx2: " << dfdx2 << std::endl;
+    std::cout << "dfdx3: " << dfdx3 << std::endl;
+}