findmax from imported file

can someone show me some code for a findmax function?

I am going to be importing a file that could have up to 10 rows in it. we'll say rate is one of the columns in that file and i want to find the max number in that column.

I am using a rate[i] array.

If you're using an array and you want to know the max #, why not step through with a for loop?

Code:

---

int y = 0;

        for (int x = 1; x < MAX_I_VAL; x++)
        {
            if ((rate[x] > rate[x-1]) && (rate[x] > y))
            {
                y = rate[x];
            }
       
            else if ((rate[x-1] > rate[x]) && (rate[x-1] > y))
            {
                y = rate[x-1];
            }
        }

std::cout << "The highest value in the array is " << y;

---

Or something similar to that?

I think i'm calling it wrong too. it's at the bottom.

Code:

---

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

void ProcessPayroll(string [], int[], float[], float&, char&, float&, ifstream&, ofstream&);
void findMax(int, int);
int main()
{
        ifstream infile;  //opening infile
        infile.open ("lab1.txt");
        if(infile.fail())
        {
                cout << "failing to open input file\n";  //check to see if infile is open
                getchar();
                exit(1);
        }

        ofstream outfile;  //opening outfile
        outfile.open ("out1.txt");
        if(outfile.fail())
        {
                cout << "failing to open output file\n";  //check to see if outfile is open
                getchar();
                exit(1);
        }
       
       
        const int i=15;
        int hours[i];
        float rate[i], gross, adjgross;
        string name[i];
        char bonus;

        ProcessPayroll(name, hours, rate, gross, bonus, adjgross, infile, outfile);  //calling ProcessPayroll function
        getchar();
        return 0;
}

void ProcessPayroll(string name[], int hours[], float rate[], float& gross, char& bonus, float& adjgross, ifstream& infile, ofstream& outfile)
//processes payroll
{
        int j, i=0, count=0, y;

        cout << "December 1997 Payroll\n\n" << "          Name" << "  " << "Hours" << "  " << "Rate" << "  " << "Gross" << "  "
                << "Bonus" << "  " << "Adjusted-Gross\n\n";  //shows headers
        outfile << "Name" << "  " << "Hours" << "  " << "Rate" << "  " << "Gross" << "  "
                << "Bonus" << "  " << "Adjusted-Gross\n\n";  //shows headers in outfile


        while(infile >> name[i] >> rate[i] >> hours[i])
                i++;
        for(j=0; j<i; j++)
        {
                if(hours[j] < 30)
               
            gross=(rate[j]-.25)*hours[j];  //calc gross pay
                else
                        gross=rate[j]*hours[j];

                if(hours[j] < 30)

                        rate[j]=(rate[j]-.25);
                else
                        rate[j]=rate[j];
               

                if(hours[j] > 45)  //calc bonus code
               
                        bonus = 'Y';
                else
                    bonus = 'N';
               
               
                if(hours[j] > 45)  //calc adjusted gross
               
                        adjgross = gross + 50;
                else
                        adjgross = gross;

                count = i ;
       
       
        cout << setw(15) << name[j] << "    "
                << setw(2) << hours[j] << "  "
                << setw(5) << setiosflags(ios::fixed) << setprecision(2) << rate[j] << "  "
            << setw(7) << setiosflags(ios::fixed) << setprecision(2) << gross << "    "
            << setw(2) << bonus << "        "
                << setw(7) << setiosflags(ios::fixed) << setprecision(2) << adjgross << "\n";
        }

        cout << "\nNumber of Employees\n\n" << count << "\n\n"
                << "Maximum Pay Rate\n\n" << findMax;


        getchar ();
        outfile.close();
        return;
}

void findMax(int j, int y)
{
        int y=0;
        for(int j=1; j<Max_I_Val; j++)
        {
                if((rate[j] > rate[j-1]) && (rate[j] > y))
                {
                        y=rate[j];
                }
                else if((rate[j-1] > rate[j] && (rate[j-1] > y))
                {
                        y=rate[j-1];
                }
        }
}

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1.) Why are you passing it a y value? It's made to return(y) so you can do statements such as 'std::cout << findMax(Your_Array)' and not have to worry about giving it a y value to modify.

Code:

---

cout << "\nNumber of Employees\n\n" << count << "\n\n" << "Maximum Pay Rate\n\n" << findMax;

---

For example, that should be..

Code:

---

cout << "\nNumber of Employees\n\n" << count << "\n\n" << "Maximum Pay Rate\n\n" << findMax(Your_Array);

---

Also, where is Max_I_Val #defined (or const defined)?



In the function, declare it as findMax(char* Your_Array) <drop the y>, and return(y) at the end, for starters.