View Compilation Error

0_0_23528607_2232.cpp:18:5: error: expected initializer before 'int'
     int sum=0;    
     ^
0_0_23528607_2232.cpp:19:5: error: expected unqualified-id before 'while'
     while(x>0)    
     ^
0_0_23528607_2232.cpp:24:5: error: expected unqualified-id before 'return'
     return sum;    
     ^
0_0_23528607_2232.cpp:25:1: error: expected declaration before '}' token
 }    
 ^