View source for Junk ← Junk

<syntaxhighlight lang="c" name="junk_1">
#include<stdio.h>
int main()
{
int a;
a=5;
printf("%d %d %d\n",a,a++, a++);
}

</syntaxhighlight>

 asuresh@parambara:~$ icc m1.c
 asuresh@parambara:~$ ./a.out
7 5 6
 asuresh@parambara:~$ gcc -Wall m1.c
m1.c:2:1: warning: return type defaults to ‘int’ [-Wreturn-type]
main()
^
m1.c: In function ‘main’:
m1.c:6:29: warning: operation on ‘a’ may be undefined [-Wsequence-point]
printf("%d %d %d\n",a,a++, a++);
^
m1.c:6:29: warning: operation on ‘a’ may be undefined [-Wsequence-point]
m1.c:7:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
 asuresh@parambara:~$ ./a.out
7 6 5

(FYI- icc is Intel compiler made by Intel and gcc is GNU compiler)