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安卓异步任务实验代码（未修改）xmljava实验代码（未修改）xml<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" x

C的小问题常用函数1. 字符串转成数字常用函数1. 字符串转成数字int str_to_int(char * str, int size){ /* 将 str 头几位转换成 int 类型 */ int res = 0; int coe = 1; int index = size - 1; while(index >= 0){ res += (*(str + index) - '0') * coe; coe *= 10;