data m;
informat x 8.2;
format x 8.2;
input x;
cards;
12345.1234
;
run;
这样就可以了
第二个直接在定义定量的时候就定义了格式，是可以的

谢谢各位关注，我用的是SAS9.1.3，这个问题想了好久，希望各位朋友再详细解释下。

w.d的informat
当数据有小数点的时候，d失效

9# soporaeternus
没有小数点呢？
呵呵

没有小数点的话
我记得是从右开始取d位作为小数，不足以0补足
我再去确认下，快忘光了

是的，sas帮助文档里面就是这样说的optionally specifies the power of 10 by which to divide the value. If the data contain decimal points, the d value is ignored.

I think this can address your question.

READING NUMERIC DATA Numeric INFORMATS are of the simple form of W.D where W is the width of the field to be read and D is the number of places to the right of the decimal. When reading numeric input, SAS will do as we ask, unless the data tell it otherwise. This is explained in the following table:

Input Data    INFORMAT     SAS Data Value
12345              6.0                   12345
12.345             6.0                   12.345
12345              6.2                   123.45
12.345             6.2                   12.345

The first and third examples show how SAS does as we asked – it read in the six-byte number and assigned the appropriate number of decimals (0 and 2). The second and fourth examples show that SAS did what the data told it – it read in the six-byte number but since the data already had decimal places, SAS listened to the data and maintained the decimal places. SAS can also read in numeric data that are formatted with commas and dollar signs as is seen in the next table.

学习了~~~~