/in/foo.c: In function 'main':
/in/foo.c:7:11: warning: comparison of constant '100' with boolean expression is always true [-Wbool-compare]
  if(-100<a<=100 || -100<b<100){
           ^~
/in/foo.c:7:9: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(-100<a<=100 || -100<b<100){
     ~~~~^~
/in/foo.c:7:26: warning: comparison of constant '100' with boolean expression is always true [-Wbool-compare]
  if(-100<a<=100 || -100<b<100){
                          ^
/in/foo.c:7:24: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(-100<a<=100 || -100<b<100){
                    ~~~~^~