包括一个函数OnesCount,可计算从1至N的所有自然数中出现过的"1"的个数. 主程序输出出从1到1234567890中所有满足N=OnesCount(N)的数N-Includes a function OnesCount, computable from 1 to N of all natural numbers appear in the number of one-off. Main output from the 1-1234567890 all to meet the N = On