trouble with my sort function

[cplusplusrookie]

Can you guys take a look at my sort function? I need to sort netpays in ascending order while displaying it's lastname, ot pay, and tax.I can not get it to compile; it gives me an error message "invalid conversion from `char*' to `char'" for my char and 3 doubles. How can I fix this?

void payroll::sortdata() {
    int i,j;    
    const int n = 100;
    double netpay[100];
	double anetpay[n];
	double overtimepay[100]; 
	double aovertimepay[n]; 
	double taxamount[100];
	double ataxamount[n];
    char lastname[100]; 
    char alastname[n]; 
    
    double temp, tempb, tempc; 
    char tempa; 
    int sorted = 0; 

      for( i = 0; i < n; i++ ){
         alastname[i] = lastname + i; 
         aovertimepay[i] = overtimepay + i;
         ataxamount[i] = taxamount +i;
         anetpay[i] = netpay + i; } //for
    
 while (!sorted){
         sorted = 1;
   
   for( j = 0; j < n -1; j++ ){  
      if ( anetpay[j] > anetpay[j+1] ){ 

         temp = anetpay[j];
         anetpay[j] = anetpay[j+1];
         anetpay[j+1] = temp;
         
         tempa = alastname[j];
         alastname[j] = alastname[j+1];
         alastname[j+1] = tempa;  
         
         tempb = aovertimepay[j];
         aovertimepay[j] = aovertimepay[j+1];
         aovertimepay[j+1] = tempb; 
         
         tempc = ataxamount[j];
         ataxamount[j] = ataxamount[j+1];
         ataxamount[j+1] = tempc; sorted = 0;
          
              }//if
         }//for
 }//while
}//sort 

[PanGalactic]

Have you learned about structs, strings, vectors and the STL sort() function yet?

[cplusplusrookie]

Nope. I dk what a STL sort is

[Zhuge]

It would be nice if you could specify the line so I/we don't have to go looking.

[cplusplusrookie]

I am unsure of the declaration lines 2-11 and 18-21. I think the logic to my sort lines 26-43 is correct.

[cplusplusrookie]

I just made an update:

declaring the prototype outside the payroll class:
void sortdata(string[], double[], double[], double[]);

New sort function def:

void sortdata(string lastname[], double overtimepay[], double taxamount[], double netpay[] ){
     int i,j;   
     const int n = 100;
     double *anetpay[n];
     double *aovertimepay[n];
     double *ataxamount[n];
     string *alastname[n];  
     double *temp, *tempb, *tempc; 
     string *tempa; 
     int sorted = 0; 

      for( i = 0; i < n; i++ ){

         alastname[i] = lastname + i; 
         aovertimepay[i] = overtimepay + i;
         ataxamount[i] = taxamount +i;
         anetpay[i] = netpay + i; } //for
    
 while (!sorted){
         sorted = 1;
   
     for( j = 0; j < n -1; j++ ){  
        if ( *anetpay[j] > *anetpay[j+1] ){ 

         temp = anetpay[j];
         anetpay[j] = anetpay[j+1];
         anetpay[j+1] = temp;
         
         tempa = alastname[j];
         alastname[j] = alastname[j+1];
         alastname[j+1] = tempa;  
         
         tempb = aovertimepay[j];
         aovertimepay[j] = aovertimepay[j+1];
         aovertimepay[j+1] = tempb; 
         
         tempc = ataxamount[j];
         ataxamount[j] = ataxamount[j+1];
         ataxamount[j+1] = tempc; sorted = 0;
          
              }//if
         }//for
 }//while
}//sort 

and calling it in the main block

sortdata(lastname,overtimepay,taxamount, netpay);

But it still will not sort. Are the above blocks correct>?

[cplusplusrookie]

Guys, any ideas on the above?