Odtnhj

I'm using Eclipse to code in C/C++ and I'm struggling with what might be something pretty easy. In my code below I use printf() and after scanf(). Althougth printf is written before scanf() the output differs. I was able to find out something about similar issue here. But I wasn't able to solve it. Any ideas?

Code:

#include <stdio.h>

int main()

 int myvariable;

 printf("Enter a number:");
 scanf("%d", &myvariable);
 printf("%d", myvariable);

 return 0;

Expected output:

Enter a number:1
1

Instead I get:

1
Enter a number:1

Your output is being buffered.
You have 4 options:

1. 
   

   explicit flush

   
   
   

   fflush after each write to profit from the buffer and still enforce the desiredbehavior/display explicitly.

   
   
   

   fflush( stdout );
   

   
   


2. 
   

   have the buffer only buffer lines-wise

   
   
   

   useful for when you know that it is enough to print only complete lines

   
   
   

   setlinebuf(stdout);
   

   
   


3. 
   

   disable the buffer

   
   
   

   setbuf(stdout, NULL);
   

   
   



4. disable buffering in your console through what ever options menu it provides

Examples:

Here is your code with option 1:

#include <stdio.h>
int main() 

 int myvariable;

 printf("Enter a number:");
 fflush( stdout );
 scanf("%d", &myvariable);
 printf("%d", myvariable);
 fflush( stdout );

 return 0;

Here is 2:

#include <stdio.h>
int main() 

 int myvariable;

 setlinebuf(stdout); 

 printf("Enter a number:");
 scanf("%d", &myvariable);
 printf("%d", myvariable);

 return 0;

and 3:

#include <stdio.h>
int main() 

 int myvariable;

 setbuf(stdout, NULL); 

 printf("Enter a number:");
 scanf("%d", &myvariable);
 printf("%d", myvariable);

 return 0;

Ok, so finally I used something similar to what @zsawyer wrote as an option labelled 3.
In my code I inserted this line:

setvbuf(stdout, NULL, _IONBF, 0);

As a first line in main():

#include <stdio.h>

int main()

 setvbuf(stdout, NULL, _IONBF, 0);

 int myvariable;

 printf("Enter a number:");
 scanf("%d", &myvariable);
 printf("%d", myvariable);

 return 0;

I got it from here.