Basic Code not working

[Metalman]

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.

I have written a functional code which compiles fine(big deal lol i know) but thus far only the 4th option "exit" works. The other 3 choices seem to not be working.

Here's my code

#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\n ========\n");
printf("Please choose a function from below:\n");
printf("1.New Project\n2.Delete\n3.List\n4.Exit\n");
scanf("%d", &choice);

    while ((choice != 1) && (choice != 2) && (choice != 3) && (choice != 4))
          {
           
           printf("You have chosen a wrong function, please use numbers 1-4:\n\n");
           printf("Main Menu\n ========\n");
           printf("Please choose a function from below:\n");
           printf("1.New Project\n2.Delete\n3.List\n4.Exit\n");
           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\n ========\n");
            printf("Please choose a function from below:\n");
            printf("1.New Project\n2.Delete\n3.List\n4.Exit\n");
            scanf("%d", &choice);             
                                 
          }        
                      
          printf("Thank u.\n");
          
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\n", &projects[i].identifier);
                    scanf("Name:%s\n", &projects[i].customer.name);
                    scanf("Surname:%s\n", &projects[i].customer.surname);
                    scanf("Give the date in dd/mm/yyyy! format :%c\n", &projects[i].date);
                    scanf("Price:&f\n", &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\n", projects[j].identifier);
               }
        }
        
        scanf("\nPlease 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("\nIdentifier:%d\n", projects[k].identifier);
                    printf("Name:%s\n", projects[k].customer.name);
                    printf("Surname:%s\n",projects[k].customer.surname);
                    printf("Date:%s\n", projects[k].date);
                    printf("Price:%d\n", projects[k].price);
                    }
        }

}

Any ideas will be really appreciated

[weaknessforcats]

It looks like you are missing break statements at the end of each of the cases in your switch.

There may be other stuff but I didn't look that far.