update: add test

src/init.c

@@ -123,7 +123,7 @@ static void refine_interval(double xl, double xr, double yl, double yr, double r
   return ;
 }
 
-static int init(double bmax, double rela_err_limit){
+int init(double bmax, double rela_err_limit){
   SampleData sample;
   sample.capacity = 2;
   sample.size=2;
@@ -139,6 +139,10 @@ static int init(double bmax, double rela_err_limit){
   //sort
 
   //output
+  printf("Total sample points number: %d\n", sample.size);
+  for (int i = 0; i < sample.size; i++) {
+    printf("%.16g %.16g\n", sample.x[i], sample.y[i]);
+  }
 
   free(sample.x);
   free(sample.y);

src/init.h

@@ -1 +1,2 @@
 double chi(double b);
+int init(double bmax, double rela_err_limit);

src/test.c

@@ -0,0 +1,8 @@
+#include "common.h"
+#include "init.h"
+
+int main(){
+  init(15.0, 1e-3);
+
+  return 0;
+}