So what I am trying to do is write a simple program with a main menu where the user will be able to fill in the details of a project,list all projects, delete a chosen project or exit the program. Projects will be saved in an array. The functions will use structures.

我已撰写了一部功能性法典,其中汇编了罚款(一般交易单知道),但迄今为止,只有第四种选择“Exit”工程。 其他3项选择似乎未奏效。

我的守则如下:

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

struct fullname
{
        char name[10];
        char surname[10];
};
struct meletes
{
        int identifier;
        struct fullname customer;
        char date[10];
        float price;
};
void initialize(struct meletes projects[10]);
struct meletes newp(struct meletes projects[10]);
struct meletes list(struct meletes projects[10]);
struct meletes deletep(struct meletes projects[10]);

int main(void)
{
int choice,k;
struct meletes projects[10];

void initialize(struct meletes projects[10]);

printf("Main Menu
 ========
");
printf("Please choose a function from below:
");
printf("1.New Project
2.Delete
3.List
4.Exit
");
scanf("%d", &choice);

    while ((choice != 1) && (choice != 2) && (choice != 3) && (choice != 4))
          {

           printf("You have chosen a wrong function, please use numbers 1-4:

");
           printf("Main Menu
 ========
");
           printf("Please choose a function from below:
");
           printf("1.New Project
2.Delete
3.List
4.Exit
");
           scanf("%d", &choice);
           }

          while (choice != 4)
          {
          switch (choice) {

                 case 1:
                 {
                  struct meletes newp(struct meletes projects[10]);

                  }

                 case 2:
                 {
                  struct meletes deletep(struct meletes projects[10]);

                  }

                 case 3:
                 {
                  struct meletes list(struct meletes projects[10]);

                  }
                         }


            printf("Main Menu
 ========
");
            printf("Please choose a function from below:
");
            printf("1.New Project
2.Delete
3.List
4.Exit
");
            scanf("%d", &choice);             

          }        

          printf("Thank u.
");

system("pause");
return 0;
}

 void initialize(struct meletes projects[10])
 {
int l;
 for(l=0; l<10; l++)
  {
          projects[l].identifier = 00000;
          projects[l].price = 0.00;
          strcpy(projects[l].customer.name,"----------");
          strcpy(projects[l].customer.surname,"----------");
          strcpy(projects[l].date, "0/0/0");
  }          
}          

struct meletes newp(struct meletes projects[10])
{
        int i;
        for(i=0; i<10; i++)
        {
                  if (projects[i].identifier == 00000)
                 {
                    scanf("Please enter the project s identifier %d
",        &projects[i].identifier);
                    scanf("Name:%s
", &projects[i].customer.name);
                    scanf("Surname:%s
", &projects[i].customer.surname);
                    scanf("Give the date in dd/mm/yyyy! format :%c
", &projects[i].date);
                    scanf("Price:&f
", &projects[i].price);
                 }
             break;
        }                

}

struct meletes deletep(struct meletes projects[10])
{
       int j,id;
        for (j=0; j<10; j++)
        {
            if (projects[j].identifier != 00000)     //Emfanizei oles tis meletes pou den ine diegrammenes
               {
               printf("%d
", projects[j].identifier);
               }
        }

        scanf("
Please insert the identifier of the project u want to delete:%d", &id);

        for(j=0; j<10; j++)
        {                       
          projects[j].identifier = 00000;
          projects[j].price = 0.00;
          strcpy(projects[j].customer.name,"----------");
          strcpy(projects[j].customer.surname,"----------");
          strcpy(projects[j].date, "0/0/0");
        }

}

struct meletes list(struct meletes projects[10])
{
       int k;
        for(k=0; k<10; k++)
        {
                 if (projects[k].identifier != 00000); 
                    {
                    printf("         Project %d:", k);
                    printf("
Identifier:%d
", projects[k].identifier);
                    printf("Name:%s
", projects[k].customer.name);
                    printf("Surname:%s
",projects[k].customer.surname);
                    printf("Date:%s
", projects[k].date);
                    printf("Price:%d
", projects[k].price);
                    }
        }

 }        `

任何想法都将得到真正的赞赏。