a lil' problem here...hihi

[kurenai]

i am having a problem with struct here...mainly at the selectionSort method..just below the main method...HELP ME PLEASE!!


#include <iostream>
#include <iomanip>
using namespace std;

const int maxname = 20;
//maximum number of struct data element
const int numrecs = 5;

//declare struct
struct PayRecord
{
long id;
char name[maxname];//maximum number of name character = 20
float rate;

};

//method prototype
void selectionSort(PayRecord employee, int numrecs2);

int main()
{
int i;

//initialize PayRecord array struct with data
PayRecord employee[numrecs] =
{
{1234, "Adam Ali", 1000},
{5321, "Yen Yen", 5000},
{3232, "John Spy", 200},
{1089, "Calie Yoeh", 333},
{1114, "Ali Baba", 1221}

};

//blank line
cout<<endl;


cout<<setiosflags(ios::left);

for(i = 0; i < numrecs ; i++)
cout<<setw(20)<<employee[i].id//display struct data id
<<setw(15)<<employee[i].id//display struct data id
<<setw(6)<<employee[i].rate//display struct data rate
<<endl;

cout<<endl;



//invoking method
selectionSort(employee[numrecs],numrecs);

return 0;
}

//selection sort method
void selectionSort(PayRecord employee[numrecs], int numrecs2)
{

int index;
//PayRecord temp;
int iteration;
float smallest;

//iterate the index after compare
for(index = 0; index < numrecs2; index++)
{


smallest = employee[index].rate;

//iterate each element for compare
for(iteration = index; iteration < numrecs2; iteration++)
{

//compare for the smallest among the available element[iteration]
if(smallest > employee[iteration].rate)
{

smallest = employee[iteration].rate;
}

}

//after comparison
int temp = employee[index];
employee[index] = employee[smallest];
employee[smallest] = temp;

}

}

here is the error from the compiler

--------------------Configuration: Soalan3 - Win32 Debug--------------------
Compiling...
Soalan3.cpp
f:\c++lab2\soalan3.cpp(89) : error C2440: 'initializing' : cannot convert from 'struct PayRecord' to 'int'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
f:\c++lab2\soalan3.cpp(90) : error C2108: subscript is not of integral type
f:\c++lab2\soalan3.cpp(90) : error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'struct PayRecord []' (or there is no acceptable conversion)
f:\c++lab2\soalan3.cpp(91) : error C2108: subscript is not of integral type
f:\c++lab2\soalan3.cpp(91) : error C2440: '=' : cannot convert from 'int' to 'struct PayRecord []'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
Error executing cl.exe.

Soalan3.obj - 5 error(s), 0 warning(s)

[hbjgd]

#include <iostream>
#include <iomanip>
using namespace std;

const int maxname = 20;
//maximum number of struct data element
const int numrecs = 5;

//declare struct
struct PayRecord
{
long id;
char name[maxname];//maximum number of name character = 20
float rate;

};

//method prototype
void selectionSort(PayRecord employee, int numrecs2);

int main()
{
int i;

//initialize PayRecord array struct with data
PayRecord employee[numrecs] =
{
{1234, "Adam Ali", 1000},
{5321, "Yen Yen", 5000},
{3232, "John Spy", 200},
{1089, "Calie Yoeh", 333},
{1114, "Ali Baba", 1221}

};

//blank line
cout<<endl;


cout<<setiosflags(ios::left);

for(i = 0; i < numrecs ; i++)
cout<<setw(20)<<employee[i].id//display struct data id
<<setw(15)<<employee[i].id//display struct data id
<<setw(6)<<employee[i].rate//display struct data rate
<<endl;

cout<<endl;



//invoking method
selectionSort(employee[numrecs],numrecs);

return 0;
}

//selection sort method
void selectionSort(PayRecord employee[numrecs], int numrecs2)
{

int index;
//PayRecord temp;
int iteration;
float smallest;

//iterate the index after compare
for(index = 0; index < numrecs2; index++)
{


smallest = employee[index].rate;

//iterate each element for compare
for(iteration = index; iteration < numrecs2; iteration++)
{

//compare for the smallest among the available element[iteration]
if(smallest > employee[iteration].rate)
{

smallest = employee[iteration].rate;
}

}

//after comparison
int temp = employee[index];
employee[index] = employee[smallest];
employee[smallest] = temp;

}

}

[hbjgd]

line 88. the variable type is int. you are trying to store an instance of "Struct Payrecord" as an int. temp should be declared as type struct Payrecord.

[kurenai]

thank you....!i have try your recommendation...the error does reduce but still leaving a problem

--------------------Configuration: Soalan3 - Win32 Debug--------------------
Compiling...
hehe.cpp
F:\c++lab2\hehe.cpp(89) : error C2108: subscript is not of integral type
F:\c++lab2\hehe.cpp(89) : error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'struct PayRecord []' (or there is no acceptable conversion)
F:\c++lab2\hehe.cpp(90) : error C2108: subscript is not of integral type
F:\c++lab2\hehe.cpp(90) : error C2440: '=' : cannot convert from 'struct PayRecord' to 'struct PayRecord []'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
Error executing cl.exe.

hehe.obj - 4 error(s), 0 warning(s)
-------------------------------------------------
especially at the line 90...we don't need to declare the same variable twice right..so i'm leaving the temp as it was...( i have try to declare the temp and it doesn't work...)

and yup...the above line keep confusing me too....@o@

[coder777]

The prototype on line 19 and the implementation on line 59 don't match. If you want an array of an unkonw size you should write it like so: void selectionSort(PayRecord employee[], int numrecs2); // Note the []

for swapping on line 88 you can use std::swap():

#include <algorithm>

...

std::swap(employee[index], employee[smallest]);

EDIT: If you want to write it yourself:

PayRecord temp = employee[index];
employee[index] = employee[smallest];
employee[smallest] = temp;