这个程序的内层循环总次数是几次 for m=0 to 7 step 3 for n =m-1 to m+1 next n next m

这个程序的内层循环总次数是几次 for m=0 to 7 step 3 for n =m-1 to m+1 next n next m
for m=0 to 7 step 3
for n =m-1 to m+1
next n
next m