【发布时间】：2016-01-04 19:35:15
【问题描述】：
我正在尝试创建此函数以从指针结构数组类型中删除用户选择的元素。
这是我的功能。当我的代码运行此函数时，我不断收到此错误。
错误：从类型“char *”分配给类型“char[1000]”时类型不兼容
PhoneBook[iRecord - 1].cFirstName = PhoneBook[x].cFirstName;
void delete_record(pb *PhoneBook)
{
int x;
int iRecord = 0;
print(PhoneBook);
printf("\nEnter number of record you want to delete: ");
scanf("%d", &iRecord);
printf("\nRecord to be deleted: %d. %s\n", iRecord - 1, PhoneBook[iRecord - 1].cFirstName);
for (x = strlen(PhoneBook[iRecord - 1].cFirstName); x <= strlen(PhoneBook[iRecord - 1].cFirstName); x--) {
PhoneBook[iRecord - 1].cFirstName = PhoneBook[x].cFirstName;
}
printf("\nModified record: %s\n\n",PhoneBook[iRecord - 1].cFirstName);
}
这是完整的代码。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
typedef struct phonebook {
char cFirstName[1000];
char cLastName[1000];
char cNumber[1000];
} pb;
int entry(pb *);
void modify(pb *);
void delete_record(pb *);
void print(pb *);
void convert_u(char *);
//global variable
int MAX_NAME_ENTRY = 0;
int main()
{
int iResponse = 0;
pb *PhoneBook = (pb *) calloc(0, sizeof(pb));
if (PhoneBook == NULL) {
printf("\nMemory allocation failed.\n\n");
return 1;
}
do {
printf("\nPhonebook Menu\n****************\n\n");
printf("1. Enter new contact\n2. Modify existing contact\n3. Delete contact\n4. Print Phonebook \n5. Exit\n\n");
printf("Please make selection: ");
scanf("%d", &iResponse);
if (iResponse == 1) {
entry(PhoneBook);
}
else if (iResponse == 2) {
modify(PhoneBook);
}
else if (iResponse == 3) {
delete_record(PhoneBook);
//printf("\nWorking on it...\n");
}
else if (iResponse == 4) {
print(PhoneBook);
}
} while (iResponse != 5);
free(PhoneBook);
return 0;
}
int entry(pb *PhoneBook)
{
int x;
char yes_no[] = "YES";
pb *newPhoneBook = realloc(PhoneBook, (10 * sizeof(pb)));
if (newPhoneBook == NULL) {
printf("\nOut of memory!\n\n");
return 1;
}
else {
PhoneBook = newPhoneBook;
}
if (MAX_NAME_ENTRY == 10) {
printf("\nMax Number of names entered.\n");
}
for (x = MAX_NAME_ENTRY; x < 10; x++) {
if (MAX_NAME_ENTRY == 9) {
printf("\nLast entry.\n");
}
if (x > 0) {
system("clear");
printf("\nAnother entry(yes/no)? ");
scanf("%s", yes_no);
convert_u(yes_no);
}
if (strcmp(yes_no, "YES") == 0) {
printf("\nFirst Name: ");
scanf("%s", PhoneBook[x].cFirstName);
printf("\nLast Name: ");
scanf("%s", PhoneBook[x].cLastName);
printf("\nPhone Number: ");
scanf("%s", PhoneBook[x].cNumber);
MAX_NAME_ENTRY++;
}
else if (strcmp(yes_no, "NO") == 0) {
break;
}
}
}
void modify(pb *PhoneBook)
{
int iModify = 0;
char name_num[6] = {'\0'};
print(PhoneBook);
printf("\nWhich entry would you like to modify? ");
scanf("%d", &iModify);
printf("\nModify name or number? ");
scanf("%s", name_num);
convert_u(name_num);
if (strcmp(name_num, "NAME") == 0) {
printf("\nEnter new name: ");
scanf("%s %s", PhoneBook[iModify - 1].cFirstName, PhoneBook[iModify - 1].cLastName);
}
else if (strcmp(name_num, "NUMBER") == 0) {
printf("\nEnter new number: ");
scanf("%s", PhoneBook[iModify - 1].cNumber);
}
}
void delete_record(pb *PhoneBook)
{
int x;
int iRecord = 0;
print(PhoneBook);
printf("\nEnter number of record you want to delete: ");
scanf("%d", &iRecord);
printf("\nRecord to be deleted: %d. %s\n", iRecord - 1, PhoneBook[iRecord - 1].cFirstName);
for (x = strlen(PhoneBook[iRecord - 1].cFirstName); x <= strlen(PhoneBook[iRecord - 1].cFirstName); x--) {
PhoneBook[iRecord - 1].cFirstName = PhoneBook[x].cFirstName;
}
printf("\nModified record: %s\n\n",PhoneBook[iRecord - 1].cFirstName);
}
void print(pb *PhoneBook)
{
int x;
for (x = 0; x < 10; x++) {
if (strlen(PhoneBook[x].cFirstName) == 0 && strlen(PhoneBook[x].cLastName) == 0) {
break;
}
printf("\n%d. Name: %s %s", x + 1, PhoneBook[x].cFirstName, PhoneBook[x].cLastName);
printf("\n Number: %s\n\n", PhoneBook[x].cNumber);
}
}
void convert_u(char *string)
{
int x;
for (x = 0; x < strlen(string); x++) {
string[x] = toupper(string[x]);
}
}
对我做错了什么有什么建议吗？
【问题讨论】：
-
要复制数组，您需要使用
strcpy或memcpy。当且仅当数组包含 NUL 终止的字符串时，您才能使用strcpy。memcpy可用于复制任何数组，前提是您知道数组的大小（以字节为单位）。 -
您使用
strlen(PhoneBook[iRecord - 1].cFirstName)好像它与PhoneBook指向的数组中的元素数量有关。显然，它没有。