c语言的文件读写

问题描述

我想在文件中写入帐户（号码名称和余额）并随后读取这些信息，但不知何故我没有在我的代码中发现我的错误。有人可以帮助我吗？

#include <stdio.h>

#define SIZE 50

int main(){
    int accountNum;
    char name[ SIZE ];
    double balance;

    FILE * fPtr;

    if( ( fPtr = fopen( "accounts.dat","a" ) ) == NULL ) {
        printf("ERROR!!!\n");
    } else {
        printf( "Enter the account numebr,name,and balance...\n" );
        printf( "Enter EOF to end input.\n" );
        printf("=> ");
        scanf( "%d%s%lf",&accountNum,&balance );

        while( !feof( stdin ) ) {
            fprintf( fPtr,"%d %s %.2f\n",accountNum,balance );

            printf("=> ");
            scanf( "%d%s%lf",&balance );
        }

        fclose(fPtr);
        printf("The writing process was complated...\n\n");
    }

    if( ( fPtr = fopen( "accounts.dat","r" ) ) == NULL ) {
        printf("ERROR!!!\n");
    } else {
        printf("%s\n%-10s%-13s%s\n","The content of file is:","Account:","Name:","Balance:" );  

        fscanf( fPtr,"%d%s%lf",&balance );

        while( !( feof ) ) {
            printf("%-10d%-13s%.2s\n",balance );
            fscanf( fPtr,&balance );
            //fscanf( fPtr,&balance );        
        }

        fclose(fPtr);
        printf("\nThe writing process was complated...\n\n");
    }

    return 0;
}

解决方法

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