[Cleanup] Write progress to std::cout

src/one-body-sample.cc

@@ -550,13 +550,13 @@ int main(int argc, char *argv[]) {
 
         iterationWriter << iterationCounter << " ";
         if (printProgress)
-          (std::cerr << '.').flush();
+          (std::cout << '.').flush();
 
         if (state_fpi > 1) {
           double const correctionNorm = AMNorm.diff(u_saved, u);
           if (correctionNorm < fixedPointTolerance) {
             if (printProgress)
-              (std::cerr << '#').flush();
+              (std::cout << '#').flush();
 
             break;
           }
@@ -567,7 +567,7 @@ int main(int argc, char *argv[]) {
         u_saved = u;
       }
       if (printProgress)
-        std::cerr << std::endl;
+        std::cout << std::endl;
 
       writer.writeInfo(alpha, u, v);
       iterationWriter << std::endl;