View Compilation Error

0_0_31872304_27759.cpp: In function 'void floyd()':
0_0_31872304_27759.cpp:10:17: error: 'n' was not declared in this scope
  for(int k=1;k<=n;k++){
                 ^
0_0_31872304_27759.cpp:21:17: error: 'n' was not declared in this scope
  for(int i=1;i<=n;i++){
                 ^