Product Version = NetBeans IDE 8.2 (Build 201609300101)
Operating System = Windows 10 version 10.0 running on amd64
Java; VM; Vendor = 1.8.0_111
Runtime = Java HotSpot(TM) 64-Bit Server VM 25.111-b14

Reproducibility: Happens every time

STEPS:
Run code
"#include <stdio.h>

int a,b,res;

int main(int ret1)
{
    printf("Enter two digits:\n");
    scanf("%d %d",&a,&b);
    res=a+b;
    printf("The result is:\n\t%d + %d = %d\n",a,b,res);
    return 0;
}
"

ACTUAL:
C console application. It doesn't display "Enter two digits:" in output until you fill next scanf() with "Debug" configuration, but works well with "Release".

EXPECTED:
First to see ""Enter two digits:" before entering data in "Debug" build.