Thread: Need help on for loop and array

How can I change this code so it will output for two or more values in an array like vec[vSize]={5000,3000,4000}; instead of one value so in this case I would get three outputs for each timing of the for loop?

Code:

#include< iostream >
#include< iomanip >
#include< cstdlib >
#include< ctime >
#include< cstdio >
#include< fstream >

const int vSize = 1;
using namespace std;



int main()
{
   
    int vec[vSize]={5000};//,50000//,100000,200000,400000};

    //Declare the clock variables
    clock_t start,finish;
    clock_t startAll;

    //Declare and initialize all the variables
   double duration;
    
    //Declare the streams and the input and output files
    ifstream inFile;
   ofstream outFile;

    inFile.open("input1.txt");
   outFile.open("A:/output1.txt");

    
int Sum=0;
    
     
    
     for (int iterationcountselector = 0; iterationcountselector < vSize; ++iterationcountselector)
    {
         start=clock();
         for(int i =0; i < vSize ; i++)
         {
              Sum++;
              outFile<< Sum<<endl;
         }
    }

    /*     finish=clock();
         duration=(double)(finish-start)/CLOCKS_PER_SEC;
         cout<<"          "<< setw(4)<< duration;*/
         
    
          finish=clock();
         duration=(double)(finish-start)/CLOCKS_PER_SEC;
         cout<<"Total Time Duration"<< duration<<" ms"<< endl;

    
     
    for (iterationcountselector = 0; iterationcountselector < vSize; ++iterationcountselector)
    {
         
    
          for(int i =0; i < vSize; i++)
         {
              Sum++;
              outFile<< Sum<<endl;
         }
    }

         finish=clock();
         duration=(double)(finish-start)/CLOCKS_PER_SEC;
         cout<<"Total Time Duration"<< duration<<" ms"<< endl;
    
     return 0;
}//end of main

I am trying to time a for loop for different values in a array. My output is the amount of time the for loop runs for an array value.

You changed your inner loop from your last post. You want to compare i to the current value of the vec array, as indexed by the outer loop. So change your inner loop to check for i < vec[iterationcountselector]. Notice how the outer loop controls the inner loop when you use that value as the index.