运行 ID: 5507

Main.cc: In function ‘int main()’:
Main.cc:7:6: error: ‘n’ was not declared in this scope
    7 |  a = n
      |      ^
Main.cc:8:18: warning: statement has no effect [-Wunused-value]
    8 |  for(i = n - 1;i > 0;i--)
      |                ~~^~~
Main.cc:8:25: error: expected ‘;’ before ‘)’ token
    8 |  for(i = n - 1;i > 0;i--)
      |                         ^
      |                         ;
Main.cc:6:8: warning: unused variable ‘j’ [-Wunused-variable]
    6 |  int i,j,a;
      |        ^