C Programming - Input / Output - Discussion

As shown in first, scanf we can convert integer input into character using ASCII alue but second scanf get the character input using %d format specifier it cannot get converted into interger value because of precision concept in c, character consumes 1 byte and integer 4 bytes- in c we can easily store 1byte into 4bytes but we cannot stores 4bytes into 1byte.

@All.

#include<stdio.h>

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

In the case of integer it is %d and for character it ic %c.

But in {B} option printf give output in ASCII value.

So, I think option A is correct.

#include<stdio.h>
int main()
{
char ch;
int i;
scanf("%c", &i);
scanf("%d", &ch);
printf("%c %d", i, ch);
return 0;
}
in printf("%c %d", ch, i) statement-

You can store the character value inside integer value because character is of 1 byte and integer is 2 byte but you can not store integer value inside character value.

Therefore if we change this statement printf("%c %d", ch, i) we should write it as
printf("%c %d", i, ch);

I compiled and run, there was no error.

I GOT THE CORRECT ANSWER, option (B).

REASON: We should be knowing that char datatype can contain alphabet, "NUMBER", empty space etc. Thus in the first scanf, character specifier is used to get a "NUMBER" of integer datatype 'i'. And in the second scanf, integer specifier is used to get a character of char datatype 'ch' which is not possible and showing compilation error.

But why I use CodeBlock (GCC compiler) to get it compiled and each scan runs smoothly, just getting wrong value, but it just got value for each place!

I thought the error was in printf statement.

I couldn't get the answer can you explain properly?

When I'm compiling in ubuntu I'm just getting a warning not an even error and how can the answer be error?

Please help me.

Here they did not flush the buffer, so it can not ready to get the next input.

When I tried the code using the following method:
scanf("%c\n", &i);
scanf("%d", &ch);
printf("%c %d", ch, i);

It gets the two inputs from the user.