View Compilation Error

0_0_37901762_28781.cpp: In function 'int main()':
0_0_37901762_28781.cpp:117:8: error: 'i' was not declared in this scope
   for( i = n - 1; i >= 0; i-- )
        ^
0_0_37901762_28781.cpp:119:18: error: 'x' was not declared in this scope
    printf( "%c", x[i] );
                  ^