Main.cc: In function ‘int main()’: Main.cc:9:19: warning: comparison with string literal results in unspecified behavior [-Waddress] 9 | if(a[j]=="0"){ | ^~~ Main.cc:9:19: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] Main.cc:10:19: error: invalid conversion from ‘const char*’ to ‘__gnu_cxx::__alloc_traits, char>::value_type’ {aka ‘char’} [-fpermissive] 10 | a[j]="1"; | ^~~ | | | const char* Main.cc:12:19: error: invalid conversion from ‘const char*’ to ‘__gnu_cxx::__alloc_traits, char>::value_type’ {aka ‘char’} [-fpermissive] 12 | a[j]="01"; | ^~~~ | | | const char*