View Compilation Error

0_0_31705444_14863.cpp: In function 'int sum(int, int)':
0_0_31705444_14863.cpp:5:11: error: expected primary-expression before 'int'
     while(int a)
           ^
0_0_31705444_14863.cpp:5:11: error: expected ')' before 'int'
0_0_31705444_14863.cpp:5:16: error: expected initializer before ')' token
     while(int a)
                ^