C++-循环for-输入一个正整数，判断是不是质数
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Background
Description
C++-循环for-输入一个正整数，判断是不是质数
Format
Input
Output
Samples
139
质数
10
合数
1
error,请输入大于或等于2的正整数
Limitation
1s, 1024KiB for each test case.
