新人提问：究竟什么是“第一段子串”（关于strspn()）,该怎么解决
新人提问：究竟什么是“第一段子串”（关于strspn()）
完全不明白这个函数的工作原理是怎么样的？看参考手册都不明白。。。
什么“第一个子串”，，，一点都不明白
------解决方案--------------------
就是helloweenhelloween这个字符串，你搜索里面的比如ello字符串，会出现2次，第一次出现的就是你说的东西。
strspn(ello,helloweenhelloween)
结果是个数值，就是位置
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