假设我们在文件中有一些联系人,比如小型电话簿。
我想创建一个类似于在线电话簿的小程序,文本中的每个联系人都需要Line
的大小,并且信息的放置顺序如下:NAME SURNAME ADRESS PHONE
,
但每个联系人的电话数量可能超过一个。
例如:
George Mikels "green str" 123123 12121232
Maria Luis "olive str" 6548845
在我的尝试中,到目前为止我已经这样做了:
void Createtree(node **head_node)
{
int count=0,*phones;
char filename[50], name[30], surname[50], adress[70];
char c;
FILE *fp;
printf("PLease enter the name of the file\n");
scanf("%s", &filename);
fp = fopen("text.txt", "r");
if(fp == NULL)
{
printf("failed to open file");
return ;
}
do
{
c=fscanf(fp, "%s %s %s ", &name, &surname, &adress);
//takes the name ,surname and adress
printf(" %s %s %s\n", &name, &surname, &adress);
phones = (int*)malloc(sizeof(int));
//creates a dynamic array of int in order to save the phones
do
{
//saves each Number inside the array
c = fscanf(fp, " %d ", phones[count]);
count = count + 1;
phones = (int*)realloc(phones, (count +1) * sizeof(int));
// increases the size of the array in order to save all the phones
}while(c != '\n');
//does it until the end of the Line
count=0;
Insert(head_node,name,surname,phones);
//uses a function to add the Information to a list
}while(c != EOF);
};
我无法将手机保存在阵列中,我不知道为什么。
答案 0 :(得分:0)
尝试在读取之前分配数组,然后实际读取将初始化数组的元素。
// define max number size
int maxSizeOfNumber = 20;
// allocate dynamic memory
int *phones = malloc(maxSizeOfNumber * sizeof(int));
// read phone number
do {
c = fscanf(fp, "%d", &phones[count]);
count++;
} while (c > 0 && count < maxSizeOfNumber );
我建议您将电话号码存储在字符数组或字符串中,以避免存储在int
中的数字,例如以0
开头的数字,如由@Bob__评论部分。