i need to remove its errrors....

#include <iostream>
using namespace std;
#include <string.h>
#include <stdio.h>
// #include <conio.h>
#include <stdlib.h>
#include <cstring.h>

  void swapname( char nam1[] , char nam2[])
{
    char tempname[50]
	strcpy (tempname , nam1);
	strcpy (nam1 , nam2);
	strcpy (nam2 , tempname);
	
}
 void swapnumbers(float *num1 , float *num2)
{
    float tempnum;
	tempnum = *num1;
	*num1 = *num2;
	*num2 = tempnum;
}

int main ()
{
  char nam[5][50];
  int id [5];
  float grade[5];
  int level[5] , i , j , location , rotbeh;
  float max;
  system ("cls");
  for(i=0 ; i<5 ; i++)
  {
	  cout << " Enter a name " << i << " and a family : \n " ;
	  cin.getline(nam[i],50);

	  cout << " Enter An ID : \n " ;
	  cin >> id[i];

	  cout << "Enter a grade :" ;
	  cin >> grade[i];
	      
  }

  for (i=0 ; i<4 ; i++)
  { 
	  max = garde [i] ; location = i;
	  for( j=i+1 ; j<5 ; j++)
		  if (grade[j] > max)
		  { 
			  max = grade[j] ; location = j ;
		  }
		  swapname ( nam[i], nam[location]);
		  swapnumbers(&grade[i] , &grade[location]);
  }

  rotbeh = 1 ; level[0] = rotbeh ;
  for (i=1 ; i<5 ; i++)
  {
	  if(grade[i] != grade[i-1])
		  rotbeh = i;
	      level[i] = rotbeh ;
  }
  for ( i=0 ; i<5 ; i++)
  {
	  cout <<  nam[i] ;
      cout << grade[i] ;
      cout << level[i];

  }

  return 0;
}