if(argv[2][0]=='f'){
        std::vector<double> A;
        std::vector<double> B;
        std::vector<double> C;
    }
    else if(argv[2][0]=='i'){
        std::vector<int> A;
        std::vector<int> B;
        std::vector<int> C;
    }

    srand(time(NULL));
    vector_generator(A,vector_size,argv[2][0]);