View Compilation Error

0_0_16393897_2526.cpp:2:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_16393897_2526.cpp:3:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_16393897_2526.cpp:4:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_16393897_2526.cpp:5:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_16393897_2526.cpp:6:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_16393897_2526.cpp: In function 'int change(node)':
0_0_16393897_2526.cpp:20:5: error: expected ';' before 'num'
     num = num * 10 + a.arr[i];
     ^
0_0_16393897_2526.cpp:20:30: error: expected ')' before ';' token
     num = num * 10 + a.arr[i];
                              ^
0_0_16393897_2526.cpp: At global scope:
0_0_16393897_2526.cpp:22:1: error: expected unqualified-id before 'return'
 return num;
 ^
0_0_16393897_2526.cpp:23:1: error: expected declaration before '}' token
 }
 ^