#include<iostream>

#include<string>

#include<cstdio>

using namespace std;

//字符与其他类型转换函数学习

int main()

{

    //打印到字符串中

    cout << "打印到字符串中的技巧\n";

    char s[];

    sprintf(s, "%d", );//整数转为字符

    cout << s << endl;

    sprintf(s, "%5d %5d", ,);//格式控制，左对齐

    cout << s << endl;

    sprintf(s, "%-5d %-5d", , );//格式控制，右对齐

    cout << s << endl;

    sprintf(s, "%8x", );//16进制打印

    cout << s << endl;

    cout << "从字符串中读取与指定格式相符的数据\n";

    //字符串转换为数字

    int N;

    char s0[] = "";

    sscanf(s0, "%d", &N);//前导0会被过滤

    cout << N << endl;

    sscanf(s0, "%2d", &N);//按位取宽，01-->1

    cout << N << endl;

    char s1[];

    sscanf("", "%s", s1);

    cout << s1<< endl;

    sscanf("123456abcd", "%[^b]", s1);//取到指定字符为止

    cout << s1 << endl;

    sscanf("123abEFac", "%[^A-Z]", s1);//取到大写字符为止

    cout << s1 << endl;

    string s3 = s1;

    cout << s3;

    return ;

}