1. count the number of digits contained in the 1-100 number 9
2. Calculated for 1-1 / 2 + 1 / 3-1 / 4 ... + - 1/100 of
a maximum number of 10 3. Output
4 Print multiplication table
3.21 Ri practice
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Origin blog.csdn.net/doudou0309/article/details/105016674
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