问c++ queue.push()错误，为什么我不能将值推入队列

EN

    struct argType{
        char *name;
        std::queue<char *> q;//each argType has a queue for round robin
    } *argTypeDB;

    int main() {
        char *name = "na";

        char *a = "122,3,4,5,32,,21;";
        argTypeDB = (struct argType *)malloc(sizeof(struct argType));
        argTypeDB[0].name = name;
        for(int i = 0; i< 5; i++){
            argTypeDB[0].q.push(a);
            printf("%d\n", i);
        }

        free(argTypeDB);
    }