I need to print execution time by using openmp (omp_get_wtime)

#include <limits.h>
#include <iostream>
#include <numeric>
#include <fstream>
#include <vector>
#include <string.h>
#include <iomanip>
#include <omp.h>
#include <time.h>
using namespace std;
int main()
{
    double start = omp_get_wtime();
    vector<string> codons = { "ttt" }; // Better always initialize any variable or array or objects to zero or NULL or empty string.
    codons.push_back("ttc"); // { "ttt", "ttc"
    codons.push_back("tta"); // { "ttt", "ttc", "tta"
    codons.push_back("ttg"); // { "ttt", "ttc", "tta", ...
    codons.push_back("tct");
    codons.push_back("tcc");
    codons.push_back("tca");
    codons.push_back("tcg");
    codons.push_back("tat");
    codons.push_back("tac");
    codons.push_back("taa");
    codons.push_back("tag");
    codons.push_back("tgt");
    codons.push_back("tgc");
    codons.push_back("tga");
    codons.push_back("tgg");
    codons.push_back("ctt");
    codons.push_back("ctc");
    codons.push_back("cta");
    codons.push_back("ctg");
    codons.push_back("cct");
    codons.push_back("ccc");
    codons.push_back("cca");
    codons.push_back("ccg");
    codons.push_back("cat");
    codons.push_back("cac");
    codons.push_back("caa");
    codons.push_back("cag");
    codons.push_back("cgt");
    codons.push_back("cgc");
    codons.push_back("cga");
    codons.push_back("cgg");
    codons.push_back("att");
    codons.push_back("atc");
    codons.push_back("ata");
    codons.push_back("atg");
    codons.push_back("act");
    codons.push_back("acc");
    codons.push_back("aca");
    codons.push_back("acg");
    codons.push_back("aat");
    codons.push_back("aac");
    codons.push_back("aaa");
    codons.push_back("aag");
    codons.push_back("agt");
    codons.push_back("agc");
    codons.push_back("aga");
    codons.push_back("aag");
    codons.push_back("gtt");
    codons.push_back("gtc");
    codons.push_back("gta");
    codons.push_back("gtg");
    codons.push_back("gct");
    codons.push_back("gcc");
    codons.push_back("gca");
    codons.push_back("gcg");
    codons.push_back("gat");
    codons.push_back("gac");
    codons.push_back("gaa");
    codons.push_back("gag");
    codons.push_back("ggt");
    codons.push_back("ggc");
    codons.push_back("gga");
    codons.push_back("ggg"); // // { "ttt", "ttc", "tta", ..., "ggg"}
    // codons.size() is 64
    vector<int> counts(64, 0);
    string line = ""; // Always initialize.
    // int numberOfLines=0; // warning: unused variable numberOfLines
    string FileContent = "";
    string curLine = "";
    // No need to open the file inside a loop
    ifstream myfile("mouse.dat");
    if (myfile.is_open())
    {
        while (!myfile.eof())
        {
            curLine = ""; // Added this line after finding following exception when searching words "tct" "ctc"
            /*
            ------------- Exception result 4991 ------------------
            tct 4991
            Actual count: 4990
            ------------- Exception result 4687 ------------------
            ctc 4687
            Actual count: 4686
            */
            myfile >> curLine;
            FileContent += curLine;
            if ("" == curLine) // Remove blank lines if present
            {
                continue;
            }
        }
        myfile.close();
    }
    else
    {
        cout << "Unable to open file ";
        perror("Error: ");
        exit(1);
    }
    omp_set_num_threads(16);
    int id;
    id = omp_get_thread_num();
#pragma omp parallel private(id)
    {
#pragma omp sections 
        {
#pragma omp section 
            {
                for (int indx = 0; 64 > indx; indx++) // Better compare using "number comparison variable" way
                {
                    ifstream myfile("mouse.dat");
                    // Use this line for debugging
                    // cout << "FileContent:" << FileContent << '\n';
                    unsigned long CodonsLoc = 0;
                    if ("tct" == codons[indx])
                    {
                        // cout << "debuging\n";
                    }
                    while (ULONG_MAX != (CodonsLoc = FileContent.find(codons[indx], CodonsLoc)))
                    {
                        counts[indx]++;
                        // cout << "counts[indx] " << counts[indx] << '\n';
                        CodonsLoc += codons[indx].length();
                    }
                }
            
                ofstream newFile("results.txt");
                if (newFile.fail())
                {
                    perror("Opening results.txt file failed");
                    exit(2);
                }
                else
                {
                    unsigned int TotalCount = accumulate(counts.begin(), counts.end(), 0);
                    cout << "TotalCount: " << TotalCount << '\n';
                    newFile << "TotalCount: " << TotalCount << '\n';
                    for (int indx = 0; 64 > indx; indx++) // Better compare using "number comparison variable" way
                    {
                        // using setprecision having 9 digits at float
                        // using fixed to keep trailing zeros.
                        // Using setw(4) for counts[indx] alignment
                        cout << codons[indx] << " " << setw(4) << counts[indx] << " percent: " << fixed << setprecision(9) << (float)100 * counts[indx] / TotalCount << '\n';
                        newFile << codons[indx] << " " << setw(4) << counts[indx] << " percent: " << fixed << setprecision(9) << (float)100 * counts[indx] / TotalCount << '\n';
                    }
                    newFile.close();
                }
            }
        }
    }
    return 0;
    printf("Time: \t %f \n", omp_get_wtime() - start);

}