foo.cpp: In function 'int main()':
foo.cpp:21:17: error: expected primary-expression before '?' token
                 ?
                 ^
foo.cpp:22:13: error: expected primary-expression before '}' token
             }
             ^
foo.cpp:22:13: error: expected ':' before '}' token
foo.cpp:22:13: error: expected primary-expression before '}' token
foo.cpp:22:13: error: expected ';' before '}' token
foo.cpp:9:9: warning: unused variable 'c' [-Wunused-variable]
     int c,b,a=10,n,j,i;
         ^
foo.cpp:26:1: error: expected '}' at end of input
 }
 ^