如何选择何时在字符数组中打印特定字符 [英] How do I select when to print specific characters in a character array

问题描述

对于我的作业，我需要执行以下操作：

For my assignment I need to do the following

• 请求用户输入他们的姓名并将其保存为字符数组
• 
  
• 然后我需要输出用户输入的字符数。


• 然后我必须向后拼写用户名。


• 然后告诉用户字符数组的哪个部分包含他们的姓和名之间的空格



• 我需要做的最后一件事，但不能安静（实际上我完全失去了）输出用户的姓氏首先，然后名字最后（即John Doe = Doe John）;

• Ask the user to input their name and save it to a character array
• Then I need to output the number of characters input by said user
• Then I have to spell that user's name backwards
• followed by telling the user which part of the character array contained the space between their first and last name

• The last thing that I need to do but can't quiet figure out (actually I'm completely lost) is output the user's last name first then first name last (ie John Doe = Doe John);

#include <stdio.h>
#include <string.h>

int main ()
{
printf("Enter your name\n");

char name [25]={'\0'};
char * pch;

fgets(name,sizeof(name),stdin); 

printf("You Entered: %s     \n", name);

printf("There are %u characters in your name including the space. \n", strlen(name));

char end;
int i;
end = strlen(name) -1;
printf("Your name backwards is");
for (i = end; i >= 0; --i)
{
printf("%c", name [i]);
}

printf("\nLooking for the space in your name \n", name);
pch=strchr(name, ' ');
while (pch!=NULL)
{
    printf("Space found at %d\n", pch-name+1);
    pch=strchr(pch+1, ' ');
}


}

任何知道如何做的人你能解释你做了什么，所以我可以向你学习吗？

Anyone that knows how to do this Can you please explain what you did so I can learn from you?

推荐答案

我需要做的最后一件事， b $ b我完全丢失）输出用户姓氏首先然后首先
名称最后（即John Doe = Doe John）;

The last thing that I need to do but can't quiet figure out (actually I'm completely lost) is output the users last name first then first name last (ie John Doe = Doe John);

这是一个常见的任务/面试问题，如何颠倒数组中的字符串。一个优雅的虽然可能不是最有效的算法是：

It is common assignment/interview question of how to reverse an oder of strings in an array. An elegant albeit maybe not the most efficient algorithm would be:

step 1: reverse the array character by character 
step 2: reverse each string in-place

检查答案此处了解更多信息。

Check the answers here for more info.

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