(gdb) l
1 #include
2
3 int main(viod)
4 {
5 int i = 0;
6 int *p;
7 for(i;i<5;i++)
8 {
9 int s = 5;
10 int q = 3;
(gdb)
11 }
12 }
(gdb) break 9
Breakpoint 1 at 0x4004fd: file test.c, line 9.
(gdb) r
Starting program: /home/ubuntu/Desktop/test
Breakpoint 1, main (viod=1) at test.c:9
9 int s = 5;
(gdb) p s
$1 = 0
(gdb) n
10 int q = 3;
(gdb) p s
$2 = 5
(gdb) p q
$3 = 0
(gdb) n
7 for(i;i<5;i++)
(gdb) p s
No symbol "s" in current context.
(gdb) n
Breakpoint 1, main (viod=1) at test.c:9
9 int s = 5;
(gdb) p s
$4 = 5
(gdb)
你这代码贴的太随意了吧，不容易看呀！
没怎么看懂f(￣o￣) . z Z
gdb显示 int s = 5;这一行时，应该没有执行这一句，此时你p s 打印出来的是s的默认值0，在你输入命令n，后 int s = 5赋值才执行，你在打印s时就看到所赋的值5了