View Compilation Error

0_0_33787389_32508.cpp: In function 'char gc()':
0_0_33787389_32508.cpp:8:12: error: expected primary-expression before '%' token
 char gc() {%0
            ^
0_0_33787389_32508.cpp:8:13: error: expected '}' at end of input
 char gc() {%0
             ^