使用memcpy错误进行简单的MPI_Gather测试

I am learning MPI, and trying to create examples of some of the functions. I've gotten several to work, but I am having issues with MPI_Gather. I had a much more complex fitting test, but I trimmed it down to the most simple code. I am still, however, getting the following error:I am learning MPI, and trying to create example