Why does Eclipse fail on this scanf() command when the Command Prompt executes it fine?

Question

I'm new to C. Here's my code:

/* Using scanf() */
#include <stdio.h>

int main(void) {
    int iDec1, iDec2, iDec3;
    printf("Enter three decimals:\n");
    scanf("%d,%d,%d", &iDec1, &iDec2, &iDec3);
    printf("Your decimals are %d, %d and %d.", iDec1, iDec2, iDec3);
    return 0;
}

It works in the Command Prompt, but when I run it through Eclipse it doesn't do anything. After hitting stop, this appears in the Console output:

Enter three decimals

Your decimals are 3, 2147344384 and 2147344384.

What the...? How come it works fine outside Eclipse but not inside Eclipse?

Answer 1

Fix, remove the commas from the string in scanf()

Try this:

#include <stdio.h>

int main(void) {
   int iDec1, iDec2, iDec3;
   printf("Enter three decimals:\n");
   scanf("%d %d %d", &iDec1, &iDec2, &iDec3);
   printf("Your decimals are %d, %d and %d.", iDec1, iDec2, iDec3);
   return 0;
 }

Output:

Enter three decimals:
4 5 6
Your decimals are 4, 5 and 6.

Or if you stick with your program(commas in scanf string) then you need to separate the integers with commas as shown below:

Output:

Enter three decimals:
4,5,6
Your decimals are 4, 5 and 6.

Answer 2

So, this thread might help you out. Yes, it's for Java, not C, but the last post on this thread outlines how to get input to work in eclipse console. This may just come down to how you run your program.

If the info in the link doesn't help, please post the steps you take to execute your program (which menu options you use etc. Also post eclipse version). I'll try to replicate.

Answer 3

fflush(stdout); did the trick.