十字链表的建立与输出

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>

#define ok 1
#define overflow 0
#define error -1

typedef int ElemType;
typedef int Status;
typedef struct OLNode
{
    int i,j;
    ElemType e;
    struct OLNode *right,*down;

}OLNode, *OLink;

typedef struct{
    OLink *rhead,*chead;
    int mu,nu,tu;
}CrossList;
Status CreateSMatrix_OL(CrossList &M)
{
    int m,n,t;
    int i,j,e;
    int jud;
    OLink p,q;
    printf("请输入稀疏矩阵的行数、列数、非零元个数：");
    scanf("%d%d%d", &m, &n, &t);
    M.mu=m;
    M.nu=n;
    M.tu=t;
    jud=t;
    if(!(M.rhead=(OLink *)malloc((m+1)*sizeof(OLink)))) exit(overflow);
    if(!(M.chead=(OLink *)malloc((n+1)*sizeof(OLink)))) exit(overflow);
    for(i=0;i<=m;i++) M.rhead[i]=NULL;
    for(i=0;i<=n;i++) M.chead[i]=NULL;
    for(jud=0; jud<t;jud++)
    {
        scanf("%d%d%d", &i, &j, &e);
        if(!(p=(OLNode *)malloc(sizeof(OLNode)))) exit(overflow);
        p->i=i; p->j=j; p->e=e;
        if(M.rhead[i]==NULL||M.rhead[i]->j>j) {p->right=M.rhead[i]; M.rhead[i]=p;}
        else{
            for(q=M.rhead[i];(q->right)&&(q->right->j<j);q=q->right);
            p->right=q->right; q->right=p;
        }
        if(M.chead[j]==NULL||M.chead[j]->i>i) {p->down=M.chead[j]; M.chead[j]=p;}
        else{
            for(q=M.chead[j];(q->down)&&q->down->i<i;q=q->down);
            p->down=q->down; q->down=p;
        }
    }

return ok;
}
int PrintSMatrix(CrossList M)
 {
     int i,j;
     OLink p;
     printf("%d行%d列%d个非零元素\n",M.mu,M.nu,M.tu);
     printf("请输入选择(1.按行输出 2.按列输出): ");
     scanf("%d",&i);
     switch(i)
     {
         case 1:
             for(j=1;j<=M.mu;j++)
             {
                 p=M.rhead[j];
                while(p)
                 {
                     printf("%d行%d列值为%d\n",p->i,p->j,p->e);
                     p=p->right;
                }
             }
            break;

         case 2:
             for(j=1;j<=M.nu;j++)
             {
               p=M.chead[j];
                 while(p)
                 {
                     printf("%d行%d列值为%d\n",p->i,p->j,p->e);
                     p=p->down;
                 }
             }
         }
     return ok;
 }
int main()
{
    CrossList M;
    CreateSMatrix_OL(M);
    PrintSMatrix(M);


    return 0;
}