cat >test_ver.cpp << EOF
    #include <cstdio>
    
    struct version {
        int Major;
        int Minor;
        int Patch;
    
        version(int major, int minor, int patch)
            : Major(major)
            , Minor(minor)
            , Patch(patch)
        { }
    };
    
    bool operator<=(version lhs, version rhs) {
        return (lhs.Major < rhs.Major)
            || ((lhs.Major == rhs.Major) && ((lhs.Minor < rhs.Minor)
                    || ((lhs.Minor == rhs.Minor) && (lhs.Patch <= rhs.Patch))));
    }
    
    int main(int argc, char **argv) {
        version lhs(4, 3, 7);
        version rhs(3, 3, 7);
    
        printf("lhs <= rhs? %s\n", lhs <= rhs ? "true" : "false");
    }
    EOF

    g++ test_ver.cpp -o test_ver && ./test_ver
    

    lhs <= rhs? false