新人求助 为什么运行不显示 感觉没问题啊

Question

 #include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
#define Maxsize 50
typedef struct
{
  int data[Maxsize];
  int length;

}Sqlist;
void ListInsert(Sqlist *l,int i,int e)
{

   int j;
    if(i<1||i>l->length+1)
        exit(-1);
    if(l->length>=Maxsize)
        exit(-1);
    for(j=l->length;j>=i;j--)
        l->data[j]=l->data[j-1];
    l->data[i-1]=e;
    l->length++;
}
void dislist(Sqlist *l)
{
    int i;
    for(i=0;i<l->length;i++)
        printf("%d ",l->data[i]);
    printf("\n");
}
void exchange(Sqlist *a,Sqlist *b,Sqlist *c)
{
    int i=0,j=0,k=0;
    while((i<a->length)&&(j<b->length))
    {
        if(a->data[i]<b->data[j])
            c->data[k++]=a->data[i++];
        else if(a->data[i]>b->data[j])
            c->data[k++]=b->data[j++];
    }
    while(i<a->length)
        c->data[k++]=a->data[i++];
    while(j<b->length)
        c->data[k++]=b->data[j++];
    c->length=k;
}
int main()
{
    Sqlist *a,*b,*c;
    a=(Sqlist*)malloc(sizeof(Sqlist));
    a->length=0;
    b=(Sqlist*)malloc(sizeof(Sqlist));
    b->length=0;
    c=(Sqlist*)malloc(sizeof(Sqlist));
    c->length=0;
    ListInsert(a,1,2);
    ListInsert(a,2,3);
    ListInsert(a,3,4);
    ListInsert(a,4,55);
    ListInsert(a,5,123);
    ListInsert(b,1,6);
    ListInsert(b,2,34);
    ListInsert(b,3,56);
    ListInsert(b,4,67);
    ListInsert(b,5,123);
    ListInsert(b,6,234);
    ListInsert(b,7,1234);
    exchange(a,b,c);
    printf("顺序表A：");
    dislist(a);
    printf("顺序表B：");
    dislist(b);
    printf("顺序表C: ");
    dislist(c);
    return 0;
}

Answer 1

代码贴的不对，应该以代码的方式贴上。否则

 #include <stdio.h>

都显示不出来

for循环和 while , if  等最好都用 {  } 包起来