运行 ID: 86859

Main.cc: In function ‘int main()’:
Main.cc:11:5: error: expected ‘,’ or ‘;’ before ‘enum’
     enum ch={'A','T','C','G'};
     ^~~~
Main.cc:12:16: error: expected ‘)’ before ‘in’
     while(a[i] in ch){
                ^~
Main.cc:12:16: error: ‘in’ was not declared in this scope
Main.cc:12:16: note: suggested alternative: ‘i’
     while(a[i] in ch){
                ^~
                i