{ ofstream outputfile; outputfile.open("Results.txt"); ifstream inputfile; inputfile.open("file-001.mca"); double E2=0, C2=0, E1=0, C1=0; while (inputfile >> E1 >> C1){ if (E1==E2){ C2 = C2+C1; } else{ outputfile << E2 << " " << C2 << endl; E2 = E1; C2 = C1; } } outputfile << E2 << " " << C1 << endl; inputfile.close(); outputfile.close(); }