Question

#include <stdio.h>
#include <stdlib.h>

struct PCSpec{
    int ComputerID;
    char ComputerName[50];
    float Price;
};


void PrintAll(int count,struct PCSpec Computer[100]);
int InputData(int count,struct PCSpec Computer[100]);
void Search(int count,struct PCSpec Computer[100]);
void SearchID(int count,struct PCSpec Computer[100]);
void SearchNAME(int count,struct PCSpec Computer[100]);
void MainMenu(int count,struct PCSpec Computer[100]);
void Option1Menu();
void Option2Menu();
void PrintSelective(struct PCSpec Computer[100]);

main()
{
int count;
struct PCSpec Computer[100];
printf("Please enter the Number Of Computer (Max is 100) ");
scanf("%d",&count);
system("cls");
Option1Menu();
MainMenu(count,Computer);
}

int InputData(int count,struct PCSpec Computer[100])
{
 int i;
 for(i=0;i<count;i++)
{
    printf("Enter the ComputerID = ");
    scanf("%d", &Computer[i].ComputerID);
    printf("Enter the ComputerName, Maximum 50 Characters = ");
    scanf(" %s",Computer[i].ComputerName);
    }
printf("Data was SUCCESSFULLY recorded!");
}

void MainMenu(int count,struct PCSpec Computer[100])
{
while (1)
{
    int option;
    printf("\nEnter your choice : ");
    scanf("%d", &option);
    switch (option)
    {
    case 1:    
        system("cls");
        InputData(count,Computer);
        system("cls");
        Option1Menu();
        break;
    case 2:
        system("cls");    
        PrintAll(count,Computer);
        Option1Menu();
        break;
    case 3:
        system("cls");
        Search(count,Computer);
    case 4: 
        exit(0);
       }
    }
}


void Search(int count,struct PCSpec Computer[100])
{
int Option;
Option2Menu();
while(1)
{
    printf("\nEnter your choice : ");
    scanf("%d",&Option);
    switch(Option)
    {
        case 1:
            system("cls");
            SearchID(count,Computer);
            Option2Menu();
            break;
        case 2:
            system("cls");
            SearchNAME(count,Computer);
            Option2Menu();
            break;
        case 3:
            system("cls");
            MainMenu(count,Computer);
        case 4:
            exit(1);
    }
 }
}

对于长代码，很抱歉，以下部分是我遇到问题的部分。我能够成功搜索，但我无法显示搜索到的结构。我最初的计划是搜索ComputerID，如果找到了，我希望它也能显示ComputerName。

如果找到ID，我想获得的输出。电脑ID = 21 计算机名=桌面

void SearchID(int count,struct PCSpec Computer[100])
{
int i,id;
printf("Please Enter Computer ID ");
scanf("%d",&id);
for(i=0;i<count;i++)
{
if(Computer[i].ComputerID == id)
    {
    printf("%d is found at %d",id,i);   
    //PrintSelective(Computer);           
    break;
    }
}
if( i == count )
printf("Unable to locate ComputerID\n");
}

对于本节，我的意图与上一节相同，但这次我想搜索ComputerName，发现它也会打印出ComputerID。

现在我遇到的问题是，我输入的输入无法找到。

void SearchNAME(int count,struct PCSpec Computer[100])
{
int j;
char NAME;
printf("Warning CASE Senstitive!\n");
printf("Please Enter Computer Name ");
scanf("%s",&NAME);
for(j=0;j<count;j++)
{
if(Computer[j].ComputerName == "NAME")
    {
    printf("%s is found at %d",NAME,j); 
    //PrintSelective(Computer);
    break;
    }
}
if( j == count )
printf("Unable to locate ComputerID\n");
}

其余几乎就是宣言

void PrintAll(int count,struct PCSpec Computer[100])
{
    int j;
    for(j=0;j<count;j++)
    {
    printf("Computer Package %d\n", j);
    printf("Computer ID = \t\t%d\n",Computer[j].ComputerID);
    printf("Computer Name = \t%s\n",Computer[j].ComputerName);
    }
}

void PrintSelective(struct PCSpec Computer[100])
{
int i;
printf("Computer Package %d\n", i);
printf("Computer ID = \t\t%d\n",Computer[i].ComputerID);
printf("Computer Name = \t%s\n",Computer[i].ComputerName);
}

void Option1Menu()
{
    printf("\n1] Create a Record\n");
    printf("2] Display Records\n");
    printf("3] Search a Record\n");
    printf("4] Exit");
}

void Option2Menu()
{
    printf("\n1] Search using ComputerID\n");
    printf("2] Search using ComputerNAME\n");
    printf("3] Back to Main Menu\n");
    printf("4] Exit the Program\n");
}

很抱歉我以前的帖子我的问题不清楚，因为我还是C的新手，所有对我的编码的反馈都表示赞赏！另一件事是，你们使用了哪个编译器？或者C的标准，以便在编写我编写的代码时，其他人不会有任何问题。

Answer 1

三件事：

使用scanf("%s",&NAME)，您将字符串读入单个字符。非空字符串始终至少需要两个字符：至少一个字符串内容加上一个字符串终结符。一个49个字符的字符串需要一个50 char的数组。
"NAME"是文字字符串，而不是变量NAME
使用Computer[j].ComputerName == "NAME"比较两个指针。使用Computer[j].ComputerName == NAME，您将比较指向单个char值的指针。如果将NAME更改为数组，则再次比较两个指针。要比较字符串，您需要使用strcmp。

Answer 2

您需要将i传递给PrintSelective：

void PrintSelective(struct PCSpec Computer[100], int i)
{
    printf("Computer Package %d\n", i);
    printf("Computer ID = \t\t%d\n",Computer[i].ComputerID);
    printf("Computer Name = \t%s\n",Computer[i].ComputerName);
}

然后将其命名为：

    PrintSelective(Computer, i);

PrintAll也应该致电PrintSelective。

或者，我不会在PrintSelective中打印索引，在这种情况下，请写为：

void PrintSelective(struct PCSpec *pComputer)
{
    printf("Computer ID = \t\t%d\n",pComputer->ComputerID);
    printf("Computer Name = \t%s\n",pComputer->ComputerName);
}

并致电：

    PrintSelective(&Computer[i]);

如何在结构中搜索并显示它

2 个答案: