我在加载函数时遇到问题，它似乎永远不起作用，我能做些什么来帮助调试此代码; 注;需要将文件实际加载到结构数组中
typedef struct
{
char FirstName[20];
char LastName[20];
char StreetAddress[20];
char Email[20];
char PhoneNumber[20];
char DateofBirth[20];
}phone;
void AddEntry(phone*);
void DeleteEntry(phone*);
void LoadEntry(phone*);
void SearchForNumber(phone*);
void Modify(phone*);
void SavetoFile(phone*);
void PrintDataEntry(phone*);
int counter = 0;
char FileName[256];
FILE *f;
FILE *pWrite;
int main(void)
{ int oldp=counter;
int p=counter;
phone*phonebook;
phonebook = (phone*)malloc(sizeof(phone)*100);
int iSelection = 0;
if (phonebook ==NULL)
{
printf("Out of Memory. The program will now exitn");
return 1;
}
else
{}
do{
printf("%d",oldp);
printf("nnt(1)tAdd person");
printf("nt(2)tSave added persons");
printf("nt(3)tLoad Phone book Entries");
printf("nt(4)tModify a person's data");
printf("nt(5)tSearch for Phone Number");
printf("nt(6)tDelete person");
printf("nt(7)tPrint the phone book");
printf("nt(8)tExit the phone book");
printf("nnWhat would you like to do?");
scanf("%d",&iSelection);
switch(iSelection)
{
case(1):
{
AddEntry(phonebook);
break;
}
case(2):
{
SavetoFile(phonebook);
break;
}
case(3):
{
LoadEntry(phonebook);
break;
}
case(4):
{
Modify(phonebook);
break;
}
case(5):
{
SearchForNumber(phonebook);
break;
}
case(6):
{
DeleteEntry(phonebook);
break;
}
case(7):
{
PrintDataEntry(phonebook);
break;
}
case(8):
{
break;
}
}
}while(iSelection <= 9);
}
void Modify(phone*phonebook)
{ int oldp=counter;
int x = 0, i = 0;
char searchTarget[20];
printf("nLast name:");
scanf("%s",searchTarget);
for(x=0;x<counter;x++)
{
if(!strcmp(searchTarget,phonebook[x].LastName))
i = x;
}
if(i)
{
printf("nFirst name:");
scanf(" %[^n]",phonebook[i].FirstName);
printf("nStreet Address:n");
scanf(" %[^n]",phonebook[i].StreetAddress);
printf("nEmail:n");
scanf("%s",phonebook[i].Email);
printf("nPhone Number:n");
scanf("%s",phonebook[i].PhoneNumber);
}
else
printf("That contact was not found, please try again.");
}
void AddEntry(phone*phonebook)
{ int oldp=counter;
pWrite = fopen("phonebook_contacts.txt","a");
if(pWrite == NULL)
{
perror("The following error occurred");
exit(EXIT_FAILURE);
}
else
{
realloc(phonebook,sizeof(phone));
printf("nFirst Name:n");
scanf(" %[^n]",phonebook[counter].FirstName);
printf("nLast Name:n");
scanf(" %[^n]",phonebook[counter].LastName);
printf("nStreet Address:n");
scanf(" %[^n]",phonebook[counter].StreetAddress);
printf("nEmail:n");
scanf("%s",phonebook[counter].Email);
printf("nPhone Number:n");
scanf("%s",phonebook[counter].PhoneNumber);
printf("ntPerson was successfully added to Phonebookn");
fprintf(pWrite,"%s,%s,%s,%s,%sn",phonebook[counter].FirstName,phonebook[counter].LastName,phonebook[counter].StreetAddress,phonebook[counter].Email,phonebook[counter].PhoneNumber);
counter++;
fclose(pWrite);
}
}
void DeleteEntry(phone*phonebook)
{ int oldp=counter;
int x = 0;
int i = 0;
char deleteFirstName[20];
char deleteLastName[20];
printf("nFirst name:");
scanf("%s",deleteFirstName);
printf("nLast name:");
scanf("%s",deleteLastName);
for(x=0;x<counter;x++)
{
if(strcmp(deleteFirstName,phonebook[x].FirstName) == 0)
{
if(strcmp(deleteLastName,phonebook[x].LastName) == 0)
{
for(i=x;i<counter-1;i++)
{
strcpy(phonebook[i].FirstName,phonebook[i+1].FirstName);
strcpy(phonebook[i].LastName,phonebook[i+1].LastName);
strcpy(phonebook[i].PhoneNumber,phonebook[i+1].PhoneNumber);
}
printf("Record deleted from the phonebook.nn");
--counter;
return;
}
}
}
printf("That contact was not found, please try again.");
}
void LoadEntry(phone*phonebook)
{
struct phone;
FILE *f;
f=fopen("phonebook_contacts.txt","r");
if(f==NULL)
{
printf("nfile opening error in listing :");
exit(1);
}
while(fread(&f,sizeof(f),1,f)==1)
{
printf("nnn YOUR RECORD ISnn ");
printf("%s%s%s%s%s",phonebook[counter].FirstName,phonebook[counter].LastName,phonebook[counter].StreetAddress,phonebook[counter].Email,phonebook[counter].PhoneNumber);
getch();
}
fclose(f);
}
void PrintDataEntry (phone*phonebook)
{ int oldp=counter;
int x = 0;
printf("nPhonebook Entries:nn");
f=fopen("phonebook_contacts.txt","r");
if(f== NULL)
{
perror("The following error occurred:");
exit(EXIT_FAILURE);
}
else
{
for(x=0;x<counter;x++)
{
printf("%s%s%s%s%s",phonebook[counter].FirstName,phonebook[counter].LastName,phonebook[counter].StreetAddress,phonebook[counter].Email,phonebook[counter].PhoneNumber);
}
}
fclose(f);
}
void SortByDateofBirth(phone*phonebook)
{ int oldp=counter;
int i = 0;
int x = 0;
int swap;
int TempCounter = counter;
phone Temp;
do{
swap = 0;
for(i=1;i<TempCounter;i++)
{
if(strcmp(phonebook[i-1].DateofBirth,phonebook[i].DateofBirth)>0)
{
Temp = phonebook[i];
phonebook[i] = phonebook[i-1];
phonebook[i-1] = Temp;
strcpy(Temp.DateofBirth,phonebook[i].DateofBirth);
strcpy(Temp.LastName,phonebook[i].LastName);
strcpy(Temp.PhoneNumber,phonebook[i].PhoneNumber);
swap = 1;
}
}
TempCounter--;
}
while(swap);
printf("nYour friends in Time Order by Date of Birth:nn");
for(x=0;x<counter;x++)
{
printf("n(%d)n",x+1);
printf("Name: %s %sn",phonebook[x].DateofBirth,phonebook[x].LastName);
printf("Number:%sn",phonebook[x].PhoneNumber);
}
}
void SortByLastName (phone*phonebook)
{ int oldp=counter;
int i = 0;
int x = 0;
int swap;
int TempCounter = counter;
phone Temp;
do{
swap = 0;
for(i=1;i<TempCounter;i++)
{
if(strcmp(phonebook[i-1].LastName,phonebook[i].LastName)>0)
{
Temp = phonebook[i];
phonebook[i] = phonebook[i-1];
phonebook[i-1] = Temp;
strcpy(Temp.FirstName,phonebook[i].FirstName);
strcpy(Temp.LastName,phonebook[i].LastName);
strcpy(Temp.PhoneNumber,phonebook[i].PhoneNumber);
swap = 1;
}
}
TempCounter--;
}
while(swap);
printf("nYour friends in Alphabetical order by First Name:nn ");
for(x=0;x<counter;x++)
{
printf("n(%d)n",x+1);
printf("Name: %s %sn",phonebook[x].FirstName,phonebook[x].LastName);
printf("Number:%sn",phonebook[x].PhoneNumber);
}
}
void SearchForNumber (phone*phonebook)
{
int x=0,*i,j=0;
char TempLastName[20];
printf("nplease type the Last name of the friend you wish to find his number.");
printf("nnLast Name:");
scanf("%s",TempLastName);
printf("nsearch result:n");
for(x=0;x<counter;x++)
{
if(!strcmp(TempLastName,phonebook[x].LastName))
{
i[j] = x;
j++;
}
}
for(j=0;j<counter;j++)
{
printf("%s,",phonebook[i[j]].FirstName);
printf("%s,",phonebook[i[j]].StreetAddress);
printf("%s,",phonebook[i[j]].Email);
printf("%s",phonebook[i[j]].PhoneNumber);
}
}
void SavetoFile (phone*phonebook)
{ int oldp=counter;
fprintf(pWrite,"%s,%s,%s,%s,%sn",phonebook[counter].FirstName,phonebook[counter].LastName,phonebook[counter].StreetAddress,phonebook[counter].Email,phonebook[counter].PhoneNumber);
oldp = counter;
}
void Quit (phone*phonebook)
{ int oldp=counter;
fopen("phonebook_contacts.txt","r");
if(!(oldp == counter))
printf("The data entered isn't saved.nAll of the changes will be discarded.");
else
exit(phonebook);}
quit 函数不应包含任何文件名，也不应包含打印！ 我无法理解如何将文件加载到结构数组中，因此如何在不泄漏太多内存大小的情况下完成此操作。
看看这一行：
while(fread(&f,sizeof(f),1,f)==1)
为什么两次使用f？你的编译器不是在对你尖叫吗？
f是一个FILE*- 它不是你可以存储数据的东西。
你打算吗
while(fread(&phone,sizeof(phone),1,f)==1)
^^^^^ ^^^^^
或 pephaps
while(fread(&phonebook[counter],sizeof(*phonebook),1,f)==1)
但话又说回来，你永远不会增加counter....