View Compilation Error

0_0_24455147_18999.c: In function 'main':
0_0_24455147_18999.c:10:5: error: expected expression before '/' token
     // show error if the user enters a negative integer
     ^
0_0_24455147_18999.c:14:5: error: 'else' without a previous 'if'
     else
     ^
0_0_24455147_18999.c:18:42: error: expected expression before '/' token
             factorial *= i;              // factorial = factorial*i;
                                          ^