View Compilation Error

0_0_23480764_2305.cpp: In function 'int main()':
0_0_23480764_2305.cpp:13:13: error: 'i' was not declared in this scope
         for(i=3;i<=50;i++)
             ^
0_0_23480764_2305.cpp:19:16: error: 'i' was not declared in this scope
         c[0]=c[i-2];
                ^