strstr函数 char* src = "123.txt"; char *p = strstr(src, "."); print(p) //.txt //如果要得到txt，则移动指针 p+ ...

char *txt = "txt"; char *rar = "rar"; if(strcmp(txt , rar ) == 0){ 　　print("相同"); } ...

这是要把局部变量初始化 可以给个 char* dest = "\0"; 初始赋值"\0" ...