Thread: Warning:'loop' has not been used!

Hi
I keep getting the following warnings:'loop' has not been used-line 34 & 153. I cannot delete data and it will not let me view data properly. Can someone see where I have gone wrong plz!

I am using Salford compiler, Plato 2 on windows.

Code:

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

int load();
void add();
void displayall();
void findone(int);
void update(int);
void deletee(int);
void sort();
void display(int);
void update(int which);
void delete1(int which);


 FILE*fin,*fout;
 struct card
            {
            char name[30];
            float salary;
            int holidays;
            }employee[10];     /*or as many as you want*/
            
 struct card temp;
 int count=0;
 int size;
 int choice=0;
 char dummy[30];
 
 
int main(void)
 {
        int loop;
        
         size=sizeof(struct card);      /*gives size in bytes*/
         
         do
         {
                printf("\n\nFile Manager\n\n");
                printf("Load File from Disk....1\n");
                printf("Add a Record...........2\n");
                printf("Display All Records....3\n");
                printf("Find One Record........4\n");
                printf("Update Record..........5\n");
                printf("Delete Record..........6\n");
                printf("Sort by Name...........7\n");
                printf("Save and Exit..........8\n");
                
                do
                {
                        printf("\nEnter Choice:");
                        fgets(dummy,30,stdin);
                        choice=atoi(dummy);
                }
                while(choice<1&&choice>8); 
                
                switch(choice)
                {
                        case 1: count=load();   break;
                        case 2: add();          break;
                        case 3: displayall();   break;
                        case 4: findone(1);             /*these all start with find*/
                                break;                  /*1 for display option*/
                        case 5: findone(2);             /*2 for update option*/
                                break;                                  
                        case 6: findone(3);             /*3 for delete option*/
                                break;
                        case 7: sort();         break;
                        case 8: ;
                 }
                 
         }
                while(choice!=8);
                fout=fopen("test.dat","wb");     /*note write mode*/
                fwrite(employee,size,count,fout);
                fclose(fout);
                
         return 0;
}

void add()
{
        do
        {
                printf("Name:");
                fgets(temp.name,30,stdin);      /*scanf no good for multiple names*/
                printf("Salary:");
                fgets(dummy,30,stdin);          /*fgets throughout for consistency*/
                temp.salary=atof(dummy);
                printf("Holiday Entitlement:");
                fgets(dummy,30,stdin);
                temp.holidays=atoi(dummy);
                employee[count]=temp;
                count++;
                printf("More(y/n)");
                fgets(dummy,30,stdin);
         }
         while(strcmp(dummy,"n\n")!=0);         /*fgets keeps the \n*/
}

int load()
{
        int loop=0;
        fin=fopen("test.dat","rb");              /*read mode*/
        while(fread(&employee[loop],size,1,fin)!=EOF)
                loop++;                         /* take count*/
        fclose(fin);
        return loop;                            /*return count to main()*/
}

void displayall()
{
        int loop;
        
        for(loop=0;loop<count;loop++)
                display(loop);
}

void findone(int option)
{
        int loop=0;
        int found=0;
        
        printf("\nEnter employee name:");
        fgets(dummy,30,stdin);
        for(loop=0;loop<count&&found==0;loop++){
                if(strcmp(dummy,employee[loop].name)==0)
                        found=1;
        if(found==0)
                printf("No one here called %s\n",dummy);
        else
        {
                loop--;                 /*undo last loop++*/
                if(option==1)
                        display(loop);
                else if(option==2)
                        update(loop);
                     else
                        delete1(loop);
       }     
}}

void display(int which)
{
        printf("%s\t",employee[which].name);
        printf("%.2f\t",employee[which].salary);
        printf("%d\n",employee[which].holidays);
}

void update(int which)
{   
        int loop;
        
        printf("Name:%s New Name or [Return]:",employee[which].name);
        fgets(temp.name,30,stdin);
        if(strlen(temp.name)>1)
                strcpy(employee[which].name,temp.name);
        printf("Salary%.2f New Value or 0:",employee[which].salary);
        fgets(dummy,30,stdin);
        temp.salary=atof(dummy);
        if(temp.salary>0)
                employee[which].salary=temp.salary;
        printf("Holidays%d New Value or 0:",employee[which].holidays);
        fgets(dummy,30,stdin);
        temp.holidays=atoi(dummy);
        if(temp.holidays>0)
                employee[which].holidays=temp.holidays;
}

void delete1(int which)
{
        int loop;
        
        count--;
        for(loop=which;loop<=count;loop++)              /*overwrite with*/
                employee[loop]=employee[loop+1];        /*the one below*/
}

void sort(void)
{
        int loop;
        int done=1;                                     /*finished sorting? flag*/
        
        while(done==1)
        {
                done=0;                                  /*assumed sorted*/
                for(loop=0;loop<count-1;loop++)
                        if(strcmp(employee[loop].name,employee[loop+1].name)>0)
                        {
                                temp=employee[loop];
                                employee[loop]=employee[loop+1];
                                employee[loop+1]=temp;
                                done=1;                 /*no it is't*/
                                
                        }   
        }
}