简答的输入输出问题求解

智能

1. include<stdio.h>
   
2. #include<stdlib.h>
   
3. typedef struct Waterdate
   
4. {
   
5. long long high;
   
6. long long wide;
   
7. struct Waterdate * next;
   
8. } WATER;
   
9. 
   
10. int main()
    
11. {
    
12. int n,i,a;
    
13. scanf("%d",&n);
    
14. WATER * head;
    
15. head=(WATER *)malloc(sizeof(WATER));
    
16. 
    
17. for(i=0;i<n;i++)
    
18. {
    
19. head->next=(WATER * )malloc(sizeof(WATER));
    
20. head=head->next;
    
21. a=scanf("%d %d",&(head->high),&(head->wide));
    
22. printf("%d %d ",head->high,head->wide,a);
    
23. }
    
24. head->next=NULL;
    
25. system("pause");
    
26. return(0);
    
27. }

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问题
1,：a不是应该返回scanf读取成功的数据个数吗，为什么打印不出来
2，：为什么 head->wide的值打印不出来

tsembrace

1. include<stdio.h>   //少了"#"
   
2. #include<stdlib.h>
   
3. typedef struct Waterdate
   
4. {
   
5. long long high;
   
6. long long wide;
   
7. struct Waterdate * next;
   
8. } WATER;
   
9. 
   
10. int main()
    
11. {
    
12. int n,i,a;
    
13. scanf("%d",&n);
    
14. WATER * head;          //变量定义摆在代码块最前面去，和上面那句scanf交换下位置
    
15. head=(WATER *)malloc(sizeof(WATER));
    
16. 
    
17. for(i=0;i<n;i++)
    
18. {
    
19. head->next=(WATER * )malloc(sizeof(WATER));
    
20. head=head->next;
    
21. a=scanf("%d %d",&(head->high),&(head->wide));     
    
22. printf("%d %d ",head->high,head->wide,a);         //格式符漏了个%d
    
23. }
    
24. head->next=NULL;
    
25. system("pause");
    
26. return(0);
    
27. }

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夏七夕

printf("%d %d ",head->high,head->wide,a);  有点小问题吧

随风听雨雪

22.printf("%d %d ",head->high,head->wide,a);多了个a吧