View Compilation Error

0_0_29950333_12501.cpp: In function 'int main()':
0_0_29950333_12501.cpp:22:12: error: 'i' was not declared in this scope
        for(i=0;i<n;i++){
            ^
0_0_29950333_12501.cpp:24:13: error: 'f' was not declared in this scope
             f[i]=i;}
             ^