View Compilation Error

0_0_29221512_7693.cpp: In function 'int cmp(long long int, long long int)':
0_0_29221512_7693.cpp:6:1: error: named return values are no longer supported
 return a>s;
 ^
0_0_29221512_7693.cpp:9:12: error: declaration of 'long long int a' shadows a parameter
  long long a,s,d,f;
            ^
0_0_29221512_7693.cpp:9:14: error: declaration of 'long long int s' shadows a parameter
  long long a,s,d,f;
              ^
0_0_29221512_7693.cpp:17:12: error: expected unqualified-id before '=' token
   long long=sum;
            ^
0_0_29221512_7693.cpp:21:4: error: 'sum' was not declared in this scope
    sum+=q[i];
    ^