Breakpoint 2 at 0x100000f35: file a.cpp, line 73.
(gdb) r
Starting program: /Users/caochenglong/Documents/pro/acm/nowcoder/a.o
[New Thread 0x180b of process 25344]
[New Thread 0x2503 of process 25344]
During startup program terminated with signal SIGTRAP, Trace/breakpoint trap.
(gdb) q