sscanf的用法

#include<iostream>
#include<stdio.h>
#include<algorithm>
using namespace std;
int main()
{
    char buf[512];
    sscanf("123456","%s",buf);
    printf("%s\n",buf);
    //输出123456

    //取指定长度的zifuchuan   如下 去最大长度为4字节的字符串
    sscanf("123456","%4s",buf);
    printf("%s\n",buf);
    //输出1234

    //遇到指定字符为止的字符串  如在下例取遇到空格为止字符串
    sscanf("123456 abcde","%[^ ]",buf);
    printf("%s\n",buf);
    //输出结果为 123456    遇到空格结束
    sscanf("123456 abcd","%[^4]",buf);
    printf("%s\n",buf);
    //输出结果为123  遇到4结束

    //跳过此数据不读入
    sscanf("123456abcd","%*d%s",buf);
    printf("%s\n",buf);
    //输出结果为  abcd   跳过了整形

    //取到指定字符集为止的字符串
    sscanf("123456abcde","%[^a-z]",buf);
    printf("%s\n",buf);
    //输出结果为123456    遇到a小写字母停止读入

    sscanf("123456abcdDAD$^&&*","%[1-9a-z]",buf);
    printf("%s\n",buf);
    //输出结果为123456abcdc  只读指定字符
    
    return 0;
}