Calculate the Value End Program Student C++

#include <iostream>
#include <stdio.h>
#include <math.h>
#include <conio.h>

void main ()
{
char name [35], neem [20], jur [15];
float assignments, quizzes, midterms, endofsemesterexams, vtask, vquizzes, vmidterms, vendofsemesterexams, vend;
//v=value
cout<<"==================================== \ n "; cout<<endl;
cout<<"End Program Student Count Value \ n";
cout<<"\ nName:"; gets (name);
cout<<"NIM"; gets (neem);
cout<<"Major:"; gets (jur);
cout<<"==================================== \ n "; cout<<endl;

cout<<"Enter the value of the task:";cin>>assignments;
cout<<"Enter the quiz:";cin>>quizzes;
cout<<"Enter a mid value:";cin>>midterms;
cout<<"Enter a value uas:";cin>>endofsemesterexams;
vtask=vtask * 0.1;
vquizzes=quizzes * 0.2;
vmidterms=midterms * 0.3;
vendofsemesterexams= endofsemesterexams* 0.4;
vend=vtask+vquizzes+vmidterms+vendofsemesterexams;

cout <<"So 10% of the value of the task is:" <<vtask <<endl;
cout <<"So 20% of the quiz is:" <<vquizzes <<endl;
cout <<"So 30% of mid value is:" <<vmidterms<<endl;
cout <<"So 40% of the value uas is:" <<vendofsemesterexams;
cout <<"So the students named" <<name <<"Getting the final value" <<vend<<endl;

if (vend>85)
{cout<<"Value A";}

   else if ((vend>=85)&&(vend>70))
{cout<<"Value B";}

   else if ((vend>=70)&&(vend>55))
{cout<<"Value C";}

   else if ((vend>=55)&&(vend>40))
{cout<<"Value D";}
   else if (vend<=40)
{cout<<"Value E";}

getche ();
}