for()的初始化要放到JUMP上边,不然i会一直为1.
for()的i++也不能放到括号里边,不然i永远为0.
1 #include<stdio.h>
2 int main(void)
3 {
4 int i=0;
5 printf("line nember is 5!\n");
6 JUMP:
7 printf("line nember is 7!\n");
8 printf("line nember is 8!\n");
9 for(;i<5;)
10 {
11 i=i+1;
12 printf("i is %d!\n",i);
13 printf("line nember is 13!\n");
14 goto JUMP;
15 printf("line nember is 15!\n");
16 }
17
18 printf("line nember is 15!\n");
19 return 0;
20
21
22 }