Thread: Help with for loop

I'm writing a program where I need to generate a conversion table for wrench sizes with the following columns: Size (Inches) [Fraction], Size (Inches) [Decimal rounded to 3], Next Bigger Metric (mm), Difference (Inches) [Next Bigger Metric-Inches], Closest Metric (mm) [to original size], and Difference (Inches) [Closest Metric-Inches]. I've created the column for the Size in fraction form relatively quickly but I cant seem to produce the decimal version. Instead, I get 0.000. Can somebody please take a look and see what I've missed? Thank you!

Code:

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


int main(int argc, char *argv[])
{


    float wrenchSize , difference1 , difference2 , SI;
    int i, nextmetric, closestMetric;
    cout.setf(ios::fixed);
    cout.precision(3);


        cout << "  Size     Size   Next Bigger   Difference     Closest    Difference" << endl;
        cout << "(Inches) (Inches) Metric (mm)    (Inches)    Metric (mm)   (Inches)" << endl;


    for(int i = 5; i <= 32; i++)
    {
        SI = i/32 ;
        nextmetric = ceil(SI) ;


        cout << setw(3) << i << "/32 " << setw(9) << SI << setw(8) << nextmetric << endl;
        //cout << setw(13) << difference1 << setw (14) << closestMetric << setw (13) << difference2 << endl;
    }


    system("PAUSE");
    return 0;
}

Do you realize that when you do math using two int values you get an int. So 1/32 would yield zero. If you want a floating point answer at least one of the terms must be a floating point number: 1.0/32 .

Jim

I changed my i value from an integer to float and in the for command as well to float i = 5.0. I'm guessing that's way wrong because now when I run the program my left most column gets a precision by 3 decimals. What did I mess up?

Nevermind! Got it!