/in/foo.c: In function 'main':
/in/foo.c:9:12: warning: missing terminating " character
     printf("sum is %d\n,sum);
            ^
/in/foo.c:9:12: error: missing terminating " character
     printf("sum is %d\n,sum);
            ^~~~~~~~~~~~~~~~~~
/in/foo.c:10:5: error: expected expression before 'return'
     return 0;
     ^~~~~~
/in/foo.c:11:1: error: expected ';' before '}' token
 }
 ^
/in/foo.c:5:10: warning: variable 'sum' set but not used [-Wunused-but-set-variable]
  int a,b,sum;
          ^~~