sscanf()函数

算法学习之输入…sscanf()

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

using namespace std;

//sscanf()函数
//sscanf的作用：
//从一个字符串中读进于指定格式相符的数据。
//利用它可以从字符串中取出整数、浮点数和字符串。
//sscanf和scanf的区别：
//scanf是以键盘作为输入源，
//sscanf是以字符串作为输入源。

int main()
{
    /*
    int day,year;
    char weekday[20],month[20],dtm[100];

    strcpy(dtm,"Saturday March 25 1989");
    sscanf(dtm,"%s %s %d %d",weekday,month,&day,&year);

    printf("%s %d,%d=%s\n",month,day,year,weekday);
    //cout << "Hello world!" << endl;
    */
    //取指定长度的字符串
    char str[100];
    sscanf("12345","%4s",str);
    printf("%s\n",str);
    //格式化时间
    int year,month,day,hour,minute,second;
    sscanf("2013/02/13 14:55:34","%d/%d/%d %d:%d:%d",&year,&month,&day,&hour,&minute,&second);
    printf("time=%d-%d-%d %d:%d:%d\n",year,month,day,hour,minute,second);
    char str1[100];
    //加上*表示跳过
    sscanf("1234abcd","%*d%s",str1);
    printf("%s\n",str1);
    //取到指定字符为止的字符串
    char str2[100];
    sscanf("1234+abc","%[^+]",str2);
    printf("%s\n",str2);
    //取遇到小写字母为止的字符串
    char str3[100];
    sscanf(" 1234+ 1234abc 1234","%[^a-z]",str3);
    printf("str3=%s\n",str3);
    //取仅包含数字和小写字母的字符串
    char str4[100];
    sscanf("123456abcdefBFRGTY7890","%[1-9a-z]",str4);
    printf("%s\n",str4);
    return 0;
}

来源：CSDN

作者：Stone 不会喝水

链接：https://blog.csdn.net/qq_16497423/article/details/104157255