fb编程求 sn=a+aa+aaa+```+的值将下列程序补充完整.求 sn=a+aa+aaa+```+的值(例如 ,当a=2,n=4时,sn=2+22+222+2222）.dim as integer a,ninput "a,n=",a,ns=0:t=0for i = 1 to ()t=()s=s+tnext iprint "s=";ssleepend
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