nearby.c: In function ‘main’:
nearby.c:12:2: warning: overflow in implicit constant conversion [-Woverflow]
  scm2=SCHAR_MIN-2;
  ^
nearby.c:13:2: warning: overflow in implicit constant conversion [-Woverflow]
  scm1=SCHAR_MIN-1;
  ^
nearby.c:24:2: warning: large integer implicitly truncated to unsigned type [-Woverflow]
  uc=UCHAR_MAX+1;
  ^
nearby.c:33:2: warning: overflow in implicit constant conversion [-Woverflow]
  ssm2=SHRT_MIN-2;
  ^
nearby.c:34:2: warning: overflow in implicit constant conversion [-Woverflow]
  ssm1=SHRT_MIN-1;
  ^
nearby.c:45:2: warning: large integer implicitly truncated to unsigned type [-Woverflow]
  us=USHRT_MAX+1;
  ^
nearby.c:54:14: warning: integer overflow in expression [-Woverflow]
  sim2=INT_MIN-2;
              ^
nearby.c:55:14: warning: integer overflow in expression [-Woverflow]
  sim1=INT_MIN-1;
              ^
nearby.c:75:15: warning: integer overflow in expression [-Woverflow]
  slm2=LONG_MIN-2;
               ^
nearby.c:76:15: warning: integer overflow in expression [-Woverflow]
  slm1=LONG_MIN-1;
               ^