如何连续输入两个字符？

Question

I have to take input as:

A B
C D
E A

So I wrote the code like this :

char ch[50][2];    
for(i=0;i<3;i++)
{
    scanf("%c%c",&ch[i][0],&ch[i][1]);
}

But it is taking only two inputs and then, I am getting runtime error. Can anybody please help me?

Answer 1

This is the method I often use: read the characters as strings.

for(i=0;i<3;i++)
{
    char buf1[2], buf2[2];
    scanf("%1s%1s",buf1,buf2);
    ch[i][0]=buf1[0];
    ch[i][1]=buf2[0];
}

Answer 2

Try

scanf(" %c %c",&ch[i][0],&ch[i][1]);

This would escape the newline \\n character left in the buffer.

Answer 3

Try with a space between chars in scanf

for(i=0;i<3;i++)
{
    scanf(" %c %c", &ch[i][0], &ch[i][1]);
}

This will cause scanf to ignore whitespace between characters. An extra space at the beginning is needed to also ignore new line character that the user inserts by pressing enter.