我试图在列中显示文本,但在输出的第二行添加了一个空格。我做错了什么吗? (条目在字符串前不包含空格)以下是涉及的函数:
add(List *book)
{
Contact *runner = book->una;
Contact *node = (Contact *) malloc(sizeof(Contact));
if (node == NULL);
else {
printf("Add a contact\n");
printf("Enter the first name: ");
scanf("%s", node->fname);
printf("Enter the last name: ");
scanf("%s", node->lname);
printf("Enter the mobile number: ");
scanf("%s", node->number);
printf("\nContact added!\n\n");
node -> next = NULL;
if(book->una == NULL){
book->una = node;
}
else
{
while( runner->next != NULL)
{
runner = runner->next;
}
runner->next = node;
}
}
}
display(List *book)
{
Contact *runner = book -> una;
if(runner == NULL)
{
printf("%20s", "PHONEBOOK EMPTY!");
return;
}
printf("Contact list\n");
printf("%-15s%-15s%-15s", "First Name", "Last Name", "Mobile number\n");
while( runner != NULL)
{
printf("%-15s%-15s%-15s\n", runner->fname, runner->lname, runner->number);
runner = runner->next;
}
}
/*An example output basically turns out like this:
First Name Last Name Mobile Number
James Harrison 123456
Wendy Barnes 00000
Cam Rodriguez 575938*/
任何输入数据都将如上所示打印。
最佳答案
您应该将 \n
放在格式字符串中而不是字段中。由于 Mobile number
有 13 个字符,加上 \n
14 并添加一个空格作为 %-15s
的填充,它位于\n
因此,在下一行。
关于c - 出于某种原因,printf 函数在我要显示的内容上添加了一个空格,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37190547/