View Compilation Error

0_0_37885940_11531.cpp: In function 'int main()':
0_0_37885940_11531.cpp:25:1: error: expected ';' before 'for'
 for (int i = n - 1, j  = 1; i >= 0; i --, j ++) {
 ^
0_0_37885940_11531.cpp:25:29: error: 'i' was not declared in this scope
 for (int i = n - 1, j  = 1; i >= 0; i --, j ++) {
                             ^
0_0_37885940_11531.cpp:25:43: error: 'j' was not declared in this scope
 for (int i = n - 1, j  = 1; i >= 0; i --, j ++) {
                                           ^
0_0_37885940_11531.cpp:51:1: error: expected '}' at end of input
 }
 ^