[問題] 鏈結串列+結構指標

看板C_and_CPP (C/C++)作者hsien0701 ( 興大研究生-賢)時間16年前 (2009/10/22 00:59)推噓3(3推 0噓 9→)

留言12則, 5人參與討論串1/1

各位高手大大好: 以下為小弟的程式碼,目的為將每個fin00%d.txt檔(各16筆10進位數字) 共有四個,用串列的方式,最後在一次輸出為一個48筆的out.txt檔 #include <stdio.h> #include <stdlib.h> #include <string.h> #include <memory.h> #define size 160 void Read (char file_name[40]); //讀.txt副程式 struct node { unsigned char buffer_1D[size]; struct node *next; }; typedef struct node Node; Node *first, *current, *previous; int main(void) { int i=0,j=0,n=0; int Data_num=1; char InName[40] ="fin000.txt"; //char OutNmae[40] ="fout000.txt"; for(Data_num=1;Data_num<=4; Data_num++) { sprintf(InName,"fin00%d.txt",Data_num); //sprintf(OutNmae,"fout00%d.txt",Data_num); current = (Node*)malloc(sizeof(Node*)); Read (InName); //讀.txt檔副程式 ///----------------以下為串列部分------------- current = (Node*)malloc(sizeof(Node*)); scanf("%d",current->buffer_1D); if(Data_num==0) { first=current; } else { previous->next=current; current->next=NULL; previous=current; } } current=first; while(current!=NULL) { previous=current; current=current->next; free(previous); } //---------------------------------------- return 0; } void Read ( char file_name[40]) { int i=0,j=0,n=0; unsigned char in0; unsigned char *input; input = (unsigned char*)malloc(160*sizeof(void*)); FILE *fp_input; fp_input = fopen(file_name,"rb"); if(fp_input == NULL) { printf( "\n Can't open file %s",file_name); system("pause"); exit(0); } n=0; while ((fscanf(fp_input, "%d\n",&in0))!=EOF) { *input=in0; current=*input;//????????出現錯誤訊息 n++; } fclose(fp_input); free(input); } 小弟可以把每個.txt檔裡面的資訊一個一個讀出來, 但是沒有辦法把讀出來的資料讀進去指標結構current當中以便利用串列把所有資料串起來, 在current=*input;會出現 error C2440: '=' : cannot convert from 'unsigned char' to 'struct node *' Conversion from integral type to pointer type requires reinterpret_cast , C-style cast or function-style cast 請各位救救我,我僵在這近四天了, 會這樣的目的是因為要應負將來資料庫不斷的存放但是總不能每次都把程式打開來再改變一些陣列大小所以做了這個小實驗請各位好心人士幫幫忙,指點指點要如何改程式,或是給別的建議我只為傳統的C而已.....XD -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.43.16.161