Accepted
/in/foo.cc: In function 'int main()':
/in/foo.cc:12:23: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
if(c!='+'&&c!='-'&&c!='/'&c!='*'){
~^~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:12:23: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
if(c!='+'&&c!='-'&&c!='/'&c!='*'){
~^~~~~
