More std::cout fixes for Windows compilation

ThirdParty/RootMinimizers/src/Math/BasicMinimizer.cxx

@@ -331,13 +331,13 @@ void BasicMinimizer::SetFinalValues(const double * x) {
 }
 
 void BasicMinimizer::PrintResult() const {
-   int pr = std::cout.precision(18);
-   std::cout << "FVAL         = " << fMinVal << std::endl;
-   std::cout.precision(pr);
+   //int pr = std::cout.precision(18);
+   std::cout << std::string("FVAL         = ") << fMinVal << std::endl;
+   std::cout << std::setprecision(18);
 //      std::cout << "Edm   = " << fState.Edm() << std::endl;
-   std::cout << "Niterations  = " << NIterations() << std::endl;
+   std::cout << std::string("Niterations  = ") << NIterations() << std::endl;
    unsigned int ncalls = NCalls();
-   if (ncalls) std::cout << "NCalls     = " << ncalls << std::endl;
+   if (ncalls) std::cout << std::string("NCalls     = ") << ncalls << std::endl;
    for (unsigned int i = 0; i < fDim; ++i)
       std::cout << fNames[i] << "\t  = " << fValues[i] << std::endl;
 }

ThirdParty/RootMinimizers/src/Math/GenAlgoOptions.cxx

@@ -17,6 +17,7 @@
 #include <algorithm>
 #include <functional>
 #include <ctype.h>   // need to use c version of tolower defined here
+#include <string>
 
 namespace ROOT {
 namespace Math {

ThirdParty/RootMinimizers/src/Math/PatchedGSLSimAnMinimizer.cxx

@@ -20,6 +20,7 @@
 
 #include <iostream> 
 #include <cassert>
+#include <iomanip>
 
 namespace ROOT { 
 
@@ -101,11 +102,11 @@ bool GSLSimAnMinimizer::Minimize() {
       else 
          std::cout << "GSLSimAnMinimizer: Error in solving" << std::endl;  
 
-      int pr = std::cout.precision(18);
+      //int pr = std::cout.precision(18);
       std::cout << "FVAL         = " << MinValue() << std::endl;
-      std::cout.precision(pr);
+	  std::cout << std::setprecision(18);
       for (unsigned int i = 0; i < NDim(); ++i) 
-         std::cout << VariableName(i) << "\t  = " << X()[i] << std::endl; 
+         std::cout << VariableName(i) << std::string("\t  = ") << X()[i] << std::endl; 
    }