Main.cc: In function ‘int main()’: Main.cc:9:12: warning: comparison with string literal results in unspecified behavior [-Waddress] if(a[i]=="A"||a[i]=="B"||a[i]=="C"||a[i]=="D"||a[i]=="E") xf++; ^~~ Main.cc:9:12: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] Main.cc:9:23: warning: comparison with string literal results in unspecified behavior [-Waddress] if(a[i]=="A"||a[i]=="B"||a[i]=="C"||a[i]=="D"||a[i]=="E") xf++; ^~~ Main.cc:9:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] Main.cc:9:34: warning: comparison with string literal results in unspecified behavior [-Waddress] if(a[i]=="A"||a[i]=="B"||a[i]=="C"||a[i]=="D"||a[i]=="E") xf++; ^~~ Main.cc:9:34: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] Main.cc:9:45: warning: comparison with string literal results in unspecified behavior [-Waddress] if(a[i]=="A"||a[i]=="B"||a[i]=="C"||a[i]=="D"||a[i]=="E") xf++; ^~~ Main.cc:9:45: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] Main.cc:9:56: warning: comparison with string literal results in unspecified behavior [-Waddress] if(a[i]=="A"||a[i]=="B"||a[i]=="C"||a[i]=="D"||a[i]=="E") xf++; ^~~ Main.cc:9:56: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]