diff --git a/src/lib/lbfgs.c b/src/lib/lbfgs.c
index 3ae79d4..61a8b89 100644
--- a/src/lib/lbfgs.c
+++ b/src/lib/lbfgs.c
@@ -505,7 +505,7 @@ int lbfgs(
         /* Report the progress. */
         if (cd.proc_progress) {
             // 如果监控函数返回值不为0 则退出迭过程
-            if ((ret = cd.proc_progress(cd.instance, x, g, fx, xnorm, gnorm, step, cd.n, k, ls))) {
+            if ((ret = cd.proc_progress(cd.instance, x, g, fx, xnorm, gnorm, step, param, cd.n, k, ls))) {
                 goto lbfgs_exit;
             }
         }
diff --git a/src/lib/lbfgs.h b/src/lib/lbfgs.h
index c8de31a..dc1ea3b 100644
--- a/src/lib/lbfgs.h
+++ b/src/lib/lbfgs.h
@@ -441,6 +441,7 @@ typedef lbfgsfloatval_t (*lbfgs_evaluate_t)(
  *  @param  xnorm       The Euclidean norm of the variables.
  *  @param  gnorm       The Euclidean norm of the gradients.
  *  @param  step        The line-search step used for this iteration.
+ *  @param  param       这是我们添加了一个指针以使用参数类型来监控迭代流程
  *  @param  n           The number of variables.
  *  @param  k           The iteration count.
  *  @param  ls          The number of evaluations called for this iteration.
@@ -455,6 +456,7 @@ typedef int (*lbfgs_progress_t)(
     const lbfgsfloatval_t xnorm,
     const lbfgsfloatval_t gnorm,
     const lbfgsfloatval_t step,
+    const lbfgs_parameter_t param,
     int n,
     int k,
     int ls
diff --git a/src/sample/sample.c b/src/sample/sample.c
index 129505f..1eb0dec 100644
--- a/src/sample/sample.c
+++ b/src/sample/sample.c
@@ -30,6 +30,7 @@ static int progress(
     const lbfgsfloatval_t xnorm,
     const lbfgsfloatval_t gnorm,
     const lbfgsfloatval_t step,
+    const lbfgs_parameter_t param,
     int n,
     int k,
     int ls
diff --git a/src/sample/sample2.cpp b/src/sample/sample2.cpp
index 07fc4f8..6a411ad 100644
--- a/src/sample/sample2.cpp
+++ b/src/sample/sample2.cpp
@@ -87,12 +87,13 @@ protected:
         const lbfgsfloatval_t xnorm,
         const lbfgsfloatval_t gnorm,
         const lbfgsfloatval_t step,
+        const lbfgs_parameter_t param,
         int n,
         int k,
         int ls
         )
     {
-        return reinterpret_cast<objective_function*>(instance)->progress(x, g, fx, xnorm, gnorm, step, n, k, ls);
+        return reinterpret_cast<objective_function*>(instance)->progress(x, g, fx, xnorm, gnorm, step, param, n, k, ls);
     }
 
     int progress(
@@ -102,6 +103,7 @@ protected:
         const lbfgsfloatval_t xnorm,
         const lbfgsfloatval_t gnorm,
         const lbfgsfloatval_t step,
+        const lbfgs_parameter_t param,
         int n,
         int k,
         int ls
diff --git a/src/sample/sample3.cpp b/src/sample/sample3.cpp
index 9d964c2..d61fc42 100644
--- a/src/sample/sample3.cpp
+++ b/src/sample/sample3.cpp
@@ -20,14 +20,14 @@ public:
 		const int n, const lbfgsfloatval_t step);
 
 	static int _Progress(void *instance, const lbfgsfloatval_t *x, const lbfgsfloatval_t *g, const lbfgsfloatval_t fx,
-		const lbfgsfloatval_t xnorm, const lbfgsfloatval_t gnorm, const lbfgsfloatval_t step,
+		const lbfgsfloatval_t xnorm, const lbfgsfloatval_t gnorm, const lbfgsfloatval_t step, const lbfgs_parameter_t param,
 		int n, int k, int ls)
 	{
-		return reinterpret_cast<TEST_FUNC*>(instance)->Progress(x, g, fx, xnorm, gnorm, step, n, k, ls);
+		return reinterpret_cast<TEST_FUNC*>(instance)->Progress(x, g, fx, xnorm, gnorm, step, param, n, k, ls);
 	}
 
 	int Progress(const lbfgsfloatval_t *x, const lbfgsfloatval_t *g, const lbfgsfloatval_t fx,
-		const lbfgsfloatval_t xnorm, const lbfgsfloatval_t gnorm, const lbfgsfloatval_t step,
+		const lbfgsfloatval_t xnorm, const lbfgsfloatval_t gnorm, const lbfgsfloatval_t step, const lbfgs_parameter_t param,
 		int n, int k, int ls);
 
 	int Routine();
@@ -67,7 +67,7 @@ lbfgsfloatval_t TEST_FUNC::Func(const lbfgsfloatval_t *x, lbfgsfloatval_t *g,
 }
 
 int TEST_FUNC::Progress(const lbfgsfloatval_t *x, const lbfgsfloatval_t *g, const lbfgsfloatval_t fx,
-		const lbfgsfloatval_t xnorm, const lbfgsfloatval_t gnorm, const lbfgsfloatval_t step,
+		const lbfgsfloatval_t xnorm, const lbfgsfloatval_t gnorm, const lbfgsfloatval_t step, const lbfgs_parameter_t param,
 		int n, int k, int ls)
 {
 	clog << "iteration times: " << k << " fx = " << fx << " gnorm/xnorm = " << gnorm/xnorm << endl;