add init parameter for construct in sto_func

Author: A-006

source/module_hamilt_pw/hamilt_stodft/sto_func.cpp

@@ -7,6 +7,10 @@ template <typename REAL>
 Sto_Func<REAL>::Sto_Func()
 {
     this->tem = Occupy::gaussian_parameter;
+    this->mu  = static_cast<REAL>(0.0);
+    this->t   = static_cast<REAL>(0.0);
+    this->sigma = static_cast<REAL>(0.0);
+    this->targ_e = static_cast<REAL>(0.0);
 }
 
 template <typename REAL>

source/module_hamilt_pw/hamilt_stodft/sto_func.h

@@ -7,8 +7,8 @@ class Sto_Func
   public:
     Sto_Func();
     ~Sto_Func(){};
-    REAL tem=0; // temperature
-    REAL mu=0;  // chemical potential
+    REAL tem; // temperature
+    REAL mu;  // chemical potential
     REAL* Emin = nullptr;
     REAL* Emax = nullptr;
     void set_E_range(REAL* Emin_in, REAL* Emax_in);
@@ -25,14 +25,14 @@ class Sto_Func
     REAL nroot_mfd(REAL e);
 
   public:
-    REAL t=0;
+    REAL t;
     REAL ncos(REAL e);
     REAL nsin(REAL e);
     REAL n_sin(REAL e);
 
   public:
-    REAL sigma=0;
-    REAL targ_e=0;
+    REAL sigma;
+    REAL targ_e;
     REAL gauss(REAL e);
     REAL ngauss(REAL e);
     REAL nroot_gauss(REAL e);