I choose a program that can read data from a txt file. Now, I input two column from txt file and i want to substract first value of 2nd column to every value of 2nd column. finally I want the sum of substracted values. Can anyone please help me. Actually, i did like substract(1)+substract(2)+substract(3)+.........substract(n). But these becomes so long and mistaken can happened. So, I want a shot rules like h= sum(test[i]-test[0]).
#include<iostream>
#include<fstream>
#include<string>
#include<cstdlib>
#include<cmath>
#include<iomanip>
#include <windows.h>
using namespace std;
//void calculateAverage();
//int calculateGrade();
//void updateFrequency();
int main()
{
const int size=25;
int debug=size;
double test1[size], test2[size],h;
ifstream infile;
for(int i=0;i<size;i++)
{
test1[i]=0;
test2[i]=0;
}
cout<<"Reading from file ''input.txt''..."<<endl;
infile.open("input.txt");
while(size==debug)
{
for(int i=0;i<size;i++)
{
infile>>test1[i];
infile>>test2[i];
}
debug--;
}
for(int i=0;i<size;i++)
{
h=(test[i]-test[0]);
cout<<test1[i]<<" "<<test2[i]<<" "<< h <<" "<<endl;
}
infile.close();
system("pause");
return 0;
}