Re: newbie question about data I/O

Howdy, gurus

I want to write code to read in a large genomic file. The data look
like

Marker location freq T mu =

value
rs2977670 713754 0.925 779 9.604 141.278 2.20=

rs2977656 719811 0.992 793 9.120 134.796 2.73=

Here is my code:

#include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;

int main(int argc, char** argv)
{
        vector<string> snp_list1,snp_list2,snp_list3;
        vector<int> location1,location2,location3;
        vector<double> freq1,freq2,freq3;
        vector<int> T1,T2,T3;
        vector<double> mu1,mu2,mu3;
        vector<double> sigma_21,sigma_22,sigma_23;
        vector<double> S1,S2,S3;
        vector<double> p1,p2,p3;

        //read in 1st data file;
        FILE *in=fopen(argv[1],"r");
        char line[128];
        fgets(line,128,in); //skip the 1st row;

while (fgets(line,128,in))
{

                cout << line << endl;

                char *str = strtok(line, "\t"); // t=

                string marker(str);
                snp_list1.push_back(marker);

                str = strtok(NULL, "\t");
                location1.push_back(atof(str));

                str = strtok(NULL, "\t");
                freq1.push_back(atof(str));

                str = strtok(NULL, "\t");
                T1.push_back(atof(str));

                str = strtok(NULL, "\t");
                mu1.push_back(atof(str));

                str = strtok(NULL, "\t");
                sigma_21.push_back(atof(str));

                str = strtok(NULL, "\t");
                S1.push_back(atof(str));

                str = strtok(NULL, "\t");
                p1.push_back(atof(str));

        }
        fclose(in);

        //verify the vectors
        for (int i=0; i<snp_list1.size();++i)
                cout << snp_list1[i] << endl;
        return 0;

}

I tried to run the code but always met errors shown as "error while
dumping state..(core dumped)". I am new to C++.Thanks a lot for your
input.