/in/foo.c:4:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable:4996)
 
/in/foo.c: In function 'main':
/in/foo.c:16:2: warning: statement with no effect [-Wunused-value]
  for (i1; i1 > 0; i1--)
  ^~~
/in/foo.c:24:2: warning: statement with no effect [-Wunused-value]
  for (i2; i2 <=x1*x2; i2++)
  ^~~