如何编写MACRO将规范名称文本导入

Data sets ‘data1.txt’ through ‘data5.txt’ contain variables x and y. Use a macro do loop to infile all five data sets into SAS。求各位高手写个代码，急

%macro data(n);
%do i=1 %to &n.
%let dat="d:\data&i..txt";
data data&i.;
infile &dat;
input x y;
run;
%end;
%mend data;
%data(5);