请教：OpenMpi安装后运行报错

limen

make[1]: 进入目录“/home/limen/OPEN-MPI/openmpi-4.1.1/examples”
make[2]: 进入目录“/home/limen/OPEN-MPI/openmpi-4.1.1/examples”
mpic++ -g  hello_cxx.cc  -o hello_cxx
hello_cxx.cc: In function ‘int main(int, char**)’:
hello_cxx.cc:25:5: error: ‘MPI’ has not been declared
   25 |     MPI::Init();
      |     ^~~
hello_cxx.cc:26:12: error: ‘MPI’ has not been declared
   26 |     rank = MPI::COMM_WORLD.Get_rank();
      |            ^~~
hello_cxx.cc:27:12: error: ‘MPI’ has not been declared
   27 |     size = MPI::COMM_WORLD.Get_size();
      |            ^~~
hello_cxx.cc:31:5: error: ‘MPI’ has not been declared
   31 |     MPI::Finalize();
      |     ^~~
make[2]: *** [Makefile:140：hello_cxx] 错误 1
make[2]: 离开目录“/home/limen/OPEN-MPI/openmpi-4.1.1/examples”
make[1]: *** [Makefile:89：mpi] 错误 2
make[1]: 离开目录“/home/limen/OPEN-MPI/openmpi-4.1.1/examples”
make: *** [Makefile:79：all] 错误 2

lynn_nj

您好！请问您问题解决了吗，我也遇到这个问题了