View Compilation Error

0_0_36102043_6942.cpp: In function 'int main()':
0_0_36102043_6942.cpp:12:7: error: 'i' was not declared in this scope
   for(i=0;i<n;i++)
       ^
0_0_36102043_6942.cpp:14:7: error: 'i' was not declared in this scope
   for(i=0;i<n;i++)
       ^
0_0_36102043_6942.cpp:17:7: error: 'i' was not declared in this scope
   for(i=0;i<n;i++)
       ^
0_0_36102043_6942.cpp:19:8: error: 'j' was not declared in this scope
    for(j=0;j<2;j++)
        ^
0_0_36102043_6942.cpp:27:7: error: 'i' was not declared in this scope
   for(i=0;i<k-1;i++)
       ^