scanf读取字符

Let suppose, we want to read time in HH:MM:SS format and store in the variables hours, minutes and seconds, in that case we need to skip columns (:) from the input values.

假设，我们要读取HH：MM：SS格式的时间 ，并将其存储在小时 ， 分钟和秒的变量中，在这种情况下，我们需要从输入值中跳过列(:)。

There are two ways to skip characters:

有两种跳过字符的方法：

1. Skip any character using %*c in scanf

   在scanf中使用％* c跳过任何字符

2. And, by specifying the characters to be skipped

   并且，通过指定要跳过的字符

1)在scanf中使用％* c跳过任何字符 (1) Skip any character using %*c in scanf)

%*c skips a character from the input. For example, We used %d%*c%d and the Input is 10:20 – : will be skipped, it will also skip any character.

％* c跳过输入中的字符。 例如，我们使用％d％* c％d ，并且Input is 10:20 – ：将被跳过，也将跳过任何字符。

Example:

例：

    Input 
Enter time in HH:MM:SS format 12:12:10
Output:
Time is: hours 12, minutes 12 and seconds 10

Program:

程序：

#include <stdio.h>
int main () 
{
int hh, mm, ss;
//input time
printf("Enter time in HH:MM:SS format: ");
scanf("%d%*c%d%*c%d", &hh, &mm, &ss) ;
//print 
printf("Time is: hours %d, minutes %d and seconds %d\n" ,hh, mm, ss) ;
return 0;
}

Output

输出量

Enter time in HH:MM:SS format: 12:12:10
Time is: hours 12, minutes 12 and seconds 10

2)通过指定要跳过的字符 (2) By specifying the characters to be skipped)

We can specify the character that are going to be used in the input, for example input is 12:12:10 then the character : can be specified within the scanf() like, %d:%d:%d.

我们可以指定将在输入中使用的字符，例如，输入为12:12:10，则可以在scanf()中指定字符：，如％d：％d：％d 。

Example:

例：

    Input 
Enter time in HH:MM:SS format 12:12:10
Output:
Time is: hours 12, minutes 12 and seconds 10

Program:

程序：

#include <stdio.h>
int main () 
{
int hh, mm, ss;
//input time
printf("Enter time in HH:MM:SS format: ");
scanf("%d:%d:%d", &hh, &mm, &ss) ;
//print 
printf("Time is: hours %d, minutes %d and seconds %d\n" ,hh, mm, ss) ;
return 0;
}

Output

输出量

Enter time in HH:MM:SS format: 12:12:10
Time is: hours 12, minutes 12 and seconds 10

翻译自: https://www.includehelp.com/c/skip-characters-while-reading-integers-using-scanf.aspx

scanf读取字符