我有一个文本文件名 myData.txt 它包含以下文本:
Bob Smith 5555556666
Wei Song 5555554444
George snufolopolous 5555556666
William Kidd 5555554444
Hopalong Cassidy 5555556666
Lone Ranger 5555554444
Tonto Ng 5555556666
Pancho Vilas 5555554444
Cisco Kid 5555559999
我希望文件 myData.txt 的文本更改为以下内容:
1 Bob Smith 5555556666
2 Wei Song 5555554444
3 George snufolopolous 5555556666
4 William Kidd 5555554444
5 Hopalong Cassidy 5555556666
6 Lone Ranger 5555554444
7 Tonto Ng 5555556666
8 Pancho Vilas 5555554444
我使用的代码是 C 语言,它是:
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define MAXSIZE 8
struct Record
{
int id;
char firstName[31];
char lastName[31];
char cellPhone[11];
};
int main(void)
{
struct Record record[MAXSIZE];
int numberOfRecords = 0;
FILE *fp = NULL;
int i = 0;
fp = fopen("myData.txt","w");
if (fp == NULL)
{
while (fscanf(fp,"%s %s %s",record[i].firstName,record[i].lastName,record[i].cellPhone)
!= EOF &&
i < MAXSIZE)
{
record[i].id = i + 1;
numberOfRecords++;
i++;
}
}
fp = fopen("myData.txt","a");
if (fp == NULL)
{
for (i = 0; i < numberOfRecords; i++)
{
fprintf(fp,"%d%s%s%s\n",record[i].id,record[i].cellPhone);
}
}
return 0;
}
当我编译这段代码时,文件 myData.txt 变空了。这段代码有什么问题,请评论可能能够解决问题的资源链接。