显示错误无法将void分配给范围变量

Question

printf("Writing to pipe - Message 2 is %s\n", writemessages[1]);
write(pipefds[1], writemessages[1], sizeof(writemessages[1]));

显示错误

let categoryIds = GetCategoriesById（res.CatalogId，0，new List（））

此处显示错误，例如无法将void分配给范围变量