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problem:Given two string, write a method to decide if one is a permutation of the otherSolution:1. sort two strings and return weather str1 equal to s... 阅读全文
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problem:Implement a function void reverse(char *str) in C and C++ which reverse a null-terminated string.The solution:1. use another pointer end point... 阅读全文
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Promble:Implement an algorithm to determine if a string has all unique characters. What if you cannot use addtional data structure?My solution:1.ckeck... 阅读全文