Error in scanf() of c program

Question

Could anyone please tell me why pressing 'enter' is making the third scanf() of my code not to work while the previous one is working? Thanks in advance :)
https://code.sololearn.com/cxDIxVTfmgr6/?ref=app

Answer 1

You need to add a space in the third scanf function.
You are taking Numeric inputs before, so sometimes it happens that compiler escapes the next input if it char type.

#include <stdio.h>

int main()
{
int n, m;
char ch;
scanf("%d", &n);
scanf("%d", &m);
scanf(" %c", &ch);
printf("%d, %d_%c", n, m, ch);
return 0;
}

Answer 2

I'm not familiar with C but I edited your code. Check the comment.
https://code.sololearn.com/cG2uYTZ5R6sT/?ref=app