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字符串连接例：将“abc”,“xyz”——>"abcxyz"#include <stdio.h>#include<assert.h>char *Mystrcat(char *str1,const char *str2){ assert (str1!=NULL&&str2!=NULL);//断言：断言这件事一定成功 char *p=...

1、一换多将将字符串中的空格替换为%20。如：we are family --->we%20are%20family。时间复杂度O(n),空间复杂度O(1)#include <stdio.h>#include <string.h>#include <assert.h>void SwapStr(char *str){ assert(str...