c: dat file

 

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/**  * @file geovindu.c  * @author geovindu (Geovin Du)  * @brief  * @version 0.1  * @date 2023-10-03  *  * @copyright Copyright (c) 2023  *  */   #include "include/geovindu.h" #include <stdlib.h> #include <stdio.h> #include <string.h> //#include <iostream> //#include <iomanip>     /**  * 写文件 .dat file.  *  */ void writingDatFile() {     int i;     FILE *outFile;     float price[] = { 39.5,3.22,1.03 };     //char *descrip;//"\0"         // char a[2][9] = {"苹果","香焦","䔧"};       //char *descrip;      // char a[2][9] = {"苹果","香焦","䔧"};       //char *descrip;       char *descrip[3] = {{"苹果"},{"香焦"},{"苹果"}};     //char *descrip[3]={ {"苹果"},{"香焦"},{"䔧"}};      //char *descrip[]={"home","geovindu","du"};      //descrip=a;      outFile = fopen("prices.dat","a+");//ios::app（C++追加）  w+  a+（C追加）     if (outFile == NULL)     {         printf("文件不存在！");         //ofstream fout(outFile); //创建文件          outFile = fopen("prices.dat", "wb");     }/**/     for (i = 0; i < 3; ++i)     {         fprintf(outFile, "%-9s  %5.2f\n", descrip[i], price[i]);     }     fclose(outFile);    } /**  * 读文件 .dat file.  *  */ void readDatFile() {     FILE* inFile;     float price;     char *descrip[10];     inFile = fopen("prices.dat", "r");     if (inFile == NULL)     {         printf("\n 文件不存在");         exit(0);     }     while (fscanf(inFile, "%s %f", descrip, &price) != EOF)     {         printf("%-9s %5.2f\n", descrip, price);     }     fclose(inFile);    }

　　

 

 

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/**  * 写文件 .dat file.  *  */ void writingDatFile() {     int i;     FILE *outFile;     float price[] = { 39.5,3.22,1.03 };     string *descrip;         //char descrip[] = { "苹果","香焦","䔧"}; //,"\0"     //char* str_arr[] = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };     string descrip2[] = { "苹果","香焦","䔧" };     descrip = descrip2;       outFile = fopen("prices.dat", "w");     if (outFile == NULL)     {         printf("文件不存在！");         ofstream fout(outFile); //创建文件     }     for (i = 0; i < 3; ++i)     {         fprintf(outFile, "%-9s  %5.2f\n", descrip[i], price[i]);     }     fclose(outFile);   } /**  * 读文件 .dat file.  *  */ void readDatFile() {     FILE* inFile;     float price;     string* descrip[10];     inFile = fopen("prices.dat", "r");     if (inFile == NULL)     {         printf("\n 文件不存在");         exit(0);     }     while (fscanf(inFile, "%s %f", descrip, &price) != EOF)     {         printf("%-9s %5.2f\n", descrip, price);     }     fclose(inFile);   }