clear set talk off x=10 y=-3 for n=29+x to x ;ste p y endfor n return
问题描述：
clear set talk off x=10 y=-3 for n=29+x to x ;ste p y endfor n return
答
clear
set talk off
x=10
y=-3
for n=29+x to x step y
endfor
return
输出结果是:9
程序运行10次后,n = 9 此程序在VFP6.0中测试通过.