运行 ID: 101614

Main.cc: In function ‘int main()’:
Main.cc:10:8: error: ‘a’ was not declared in this scope
        a[n]++;
        ^
Main.cc:13:8: error: expected ‘(’ before ‘{’ token
     for{int i=0;i<=20;i++}
        ^
Main.cc:13:8: error: expected primary-expression before ‘{’ token
Main.cc:14:5: error: expected primary-expression before ‘{’ token
     {
     ^
Main.cc:14:5: error: expected ‘;’ before ‘{’ token
Main.cc:14:5: error: expected primary-expression before ‘{’ token
Main.cc:14:5: error: expected ‘)’ before ‘{’ token
Main.cc:15:15: error: ‘a’ was not declared in this scope
         cout<