Tutorial 2 Section B

// http://pastebin.com/u/TheWhiteFang
//Tutorial 2 Section B
//
//AmpRes.txt is pasted under C:\Users\*username*\Documents\Visual Studio 2010\Projects\*projectname*\*projectname*
//
#include <iostream>
#include <stdio.h>
using namespace std;

struct SVoltageData
{
    float m_Current;
    float m_Resistance;
    float m_Voltage;
    float m_CurrTotal;
    float m_RestTotal;
    float m_VoltTotal;
};

void ReadData(struct SVoltageData *pDataArr, int numData)
{
    FILE *pFile = fopen("AmpRes.txt", "r"); //pointer ish pointing at 1st elemnt of file
    int i;
    for( i = 0; i < numData; i++)
    {
        fscanf(pFile, "%f%f", &pDataArr[i].m_Current, &pDataArr[i].m_Resistance ); //%f%f will read 2 float values //fscanf is reading text file
        //dot operator for struct array
    }

    fclose(pFile);
}

void CalcVoltage(struct SVoltageData *pDataArr, int numData, float *pOutAvgRest, float *pOutAvgCurr, float *pOutAvgVolt)
{
    int i;
    pDataArr[0].m_RestTotal = 0; pDataArr[0].m_CurrTotal = 0; pDataArr[0].m_VoltTotal = 0;
    for( i = 0; i < numData; i++)
    {
        pDataArr[i].m_Voltage = pDataArr[i].m_Current * pDataArr[i].m_Resistance;

        pDataArr[0].m_VoltTotal = pDataArr[0].m_VoltTotal + pDataArr[i].m_Voltage;
        pDataArr[0].m_CurrTotal = pDataArr[0].m_CurrTotal + pDataArr[i].m_Current;
        pDataArr[0].m_RestTotal = pDataArr[0].m_RestTotal + pDataArr[i].m_Resistance;
    }

    //avg = pDataArr[i].m_Voltage / numData ;
    //pDataArr[0].m_RestTotal = pDataArr[0].m_RestTotal / numData;
    pOutAvgRest =  &pDataArr[0].m_RestTotal;
    *pOutAvgRest = pDataArr[0].m_RestTotal / numData;

    pOutAvgCurr = &pDataArr[0].m_CurrTotal;
    *pOutAvgCurr = pDataArr[0].m_CurrTotal / numData;

    pOutAvgVolt = &pDataArr[0].m_VoltTotal;
    *pOutAvgVolt = pDataArr[0].m_VoltTotal / numData;
        //two versions. Use either one.
        //version 1:(
        //pOutAvgRest = &avg;
        // )
        //version 2:(
        // strycpy(pOutAvgRes,avg)
        // )
}


void PrintVoltageData(struct SVoltageData *pDataArr, int numData) //this function will create a new file to print volt, cur and resistance
{
    FILE *pFile = fopen("VoltData.txt", "w");
    fprintf(pFile, "CURRENT:\tRESISTANCE:\tVOLTAGE:\n");
    int i;
    for(i=0; i < numData; i++)
    {
        fprintf(pFile, "\n%.2f\t\t%.2f\t\t%.2f\t\t\n", pDataArr[i].m_Current, pDataArr[i].m_Resistance ,pDataArr[i].m_Voltage);
    }

    fprintf(pFile, "\nCurrAvg: %.2f\nRestAvg: %.2f\nVoltAvg: %.2f", pDataArr[0].m_CurrTotal, pDataArr[0].m_RestTotal, pDataArr[0].m_VoltTotal);
    fclose(pFile);
}



int main()
{
    struct SVoltageData arrContent[8]; // arrContent is name

    float avgR = 0; float avgC = 0; float avgV = 0;

    ReadData(arrContent, 8);//if it is an array, we do not need to put & eg:&arrContent
    CalcVoltage(arrContent, 8, &avgR, &avgC, &avgV);
    PrintVoltageData(arrContent, 8);

    return 0;
}