View Compilation Error

0_0_34939425_10034.cpp: In function 'int main()':
0_0_34939425_10034.cpp:11:4: error: expected ';' before 'for'
    for(int i = n; i ; i--) {
    ^
0_0_34939425_10034.cpp:11:19: error: 'i' was not declared in this scope
    for(int i = n; i ; i--) {
                   ^