View Compilation Error

0_0_23370273_30215.cpp: In function 'int main()':
0_0_23370273_30215.cpp:10:5: error: a function-definition is not allowed here before '{' token
     {
     ^
0_0_23370273_30215.cpp:23:36: error: 'cmp' was not declared in this scope
             qsort(a,n,sizeof(a[0]),cmp);
                                    ^