View Compilation Error

0_0_32368707_10106.cpp: In function 'int main()':
0_0_32368707_10106.cpp:73:21: error: 'f' was not declared in this scope
         printf("%d",f[0]);
                     ^
0_0_32368707_10106.cpp:74:13: error: 'i' was not declared in this scope
         for(i=1;i<=n;i++) printf(" %d",f[i]);
             ^