实现库函数strstr查找子串.zip

#include<stdio.h> #include<string.h> char* my_strstr(const char* p1, const char* p2){ char* str1=NULL; char* str2=NULL; char* cur=(char*)p1; if(*p2=='\0'){ return (char*)p1; } while(*cur){ str1=cur; str2=(char*)p2; while((*str2)&&(*str1)&&(*str1 == *str2)){ str1++; str2++; } if(*str2=='\0'){ return cur; } if(*str1=='\0'){ return NULL; } cur++; } return NULL; } int main(){ char* arr1="abbbcde"; char* arr2="bbc"; char* ret=my_strstr(arr1,arr2); if(ret==NULL){ printf("找不到！"); } else{ printf("%s",ret); } }