Hello, good afternoon. :)

Now I got some problems with my "Create Payroll". I changed the "rate[100]" integer to "salrate[100]" float. After changing these errors prompted me.

Errors:
payroll system.cpp(157,22): Illegal use of pointer <-- This is "Error"
payroll system.cpp(158,8): Possible use of 'gsalary' before definition <-- This is "Warning"

I don't know what are the errors all about. I need some explanations with this and what should I do in order to solve this problem.

Here's the whole codes:

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

int payroll_system_menu();

int main()
{
 char fname[100][100],lname[100][100],sex[100][100],address[100][100],dob[100][100];
 char *day[5]={"Monday","Tuesday","Wednesday","Thursday","Friday"};
 int empno[100];
 int i=0,j=0,f=0,found=0;
 int srchemp,payemp,payrollmenu;
 float timeinhour[5],timeinminute[5],timeouthour[5],timeoutminute[5];
 float totalhour,totalmin,workhour;
 float sss,cashad,others,gsalary,salary,tax,deductions;
 float salrate[100];
 totalhour = 0;
 totalmin = 0;
 do
 {
  payrollmenu = payroll_system_menu();
  if(payrollmenu == 1)
  {
   clrscr();
   printf("\n\t\t******************************************");
   printf("\n\t\t********* REGISTER NEW EMPLOYEE **********");
   printf("\n\t\t******************************************");
   printf("\n\n\t\t Employee No.: ");
   scanf("%d",&empno[i]);
   printf("\t\t First Name: ");
   scanf("%s",&fname[j]);
   printf("\t\t Last Name: ");
   scanf("%s",&lname[j]);
   printf("\t\t Date of Birth: ");
   scanf("%s",&dob[j]);
   printf("\t\t Sex: ");
   scanf("%s",&sex[j]);
   printf("\t\t Address: ");
   scanf("%s",&address[j]);
   printf("\t\t Rate/Hour: ");
   scanf("%f",&salrate[i]);
   printf("\n\t\t INFORMATION HAS BEEN SAVED. THANK YOU!!!");
   i++;
   j++;
   getch();
  }
  if(payrollmenu == 2)
  {
   clrscr();
   printf("\n\t\t******************************************");
   printf("\n\t\t************ SEARCH EMPLOYEES ************");
   printf("\n\t\t******************************************");
   printf("\n\n\t\t Enter Employee Number: ");
   scanf("%d",&srchemp);
   for(i=0;i<=100;i++)
   {
    if(empno[i]==srchemp)
    {
     found=1;
     break;
    }
    else
    {
     found = 0;
    }
   }
   if(found==1)
   {
    printf("\n\t\t EMPLOYEE %d FOUND!\n",srchemp);
   }
   if(found==0)
   {
    printf("\n\t\t EMPLOYEE %d NOT FOUND!",srchemp);
   }
   getch();
  }
  if(payrollmenu == 3)
  {
   clrscr();
   printf("\n\t\t******************************************");
   printf("\n\t\t************ CREATE PAYROLL **************");
   printf("\n\t\t******************************************");
   printf("\n\n\t\t Enter Employee Number: ");
   scanf("%d",&payemp);
   for(i=0;i<=100;i++)
   {
    if(empno[i]==payemp)
    {
     found = 1;
     break;
    }
    else
    {
     found = 0;
    }
   }
   if(found == 1)
   {
    printf("\n\t\t EMPLOYEE %d FOUND!\n",payemp);
    while(f<=4)
	 {
	  printf("\n\t\t Time In for %s: ",day[f]);
	  scanf("%f:%f",&timeinhour[f],&timeinminute[f]);
	  if((timeinhour[f]>=8) && (timeinhour[f]<12))
	  {
      if(timeinhour[f]>8)
	   {
		 totalhour = totalhour + (timeinhour[f] - 8);
		 totalmin = totalmin + timeinminute[f];
	   }
	   if((timeinhour[f]==8) && (timeinminute[f]>0))
	   {
       totalmin = totalmin + timeinminute[f];
      }
	  }
	  if(timeinhour[f]>=12)
	  {
	   totalhour = totalhour + 4;
	   if(timeinhour[f]==13)
	   {
       totalmin = totalmin + timeinminute[f];
	   }
      if(timeinhour[f]>13)
	   {
	    totalhour = totalhour + (timeinhour[f] - 13);
	    totalmin = totalmin + timeinminute[f];
	   }
	  }
	  printf("\t\t Time Out for %s: ",day[f]);
	  scanf("%f:%f",&timeouthour[f],&timeoutminute[f]);
	  if(timeouthour[f]<=16)
	  {
	   if(timeouthour[f]<16)
	   {
	    totalhour = totalhour + (16 - timeouthour[f]);
	    totalmin = totalmin + (60 - timeoutminute[f]);
	   }
	   if(timeouthour[f]==16)
	   {
       totalmin = totalmin + (60 - timeoutminute[f]);
	   }
     }
     f++;
	  printf("\t\t------------------------------------------");
	 }
    printf("\n\t\t DEDUCTIONS:");
    printf("\n\t\t    SSS: ");
    scanf("%f",&sss);
    printf("\t\t    Cash Advance: ");
    scanf("%f",&cashad);
    printf("\t\t    Tax: ");
    scanf("%f",&tax);
    printf("\t\t    Others: ");
    scanf("%f",&others);
	 workhour = 40 - (totalhour + totalmin/60);
	 gsalary = salrate * workhour;
	 tax = gsalary * 0.010;
    deductions = sss + cashad + tax + others;
	 salary = gsalary - deductions;
	 printf("\n\t\t------------------------------------------\n");
	 printf("\n\t\t|                  PAYROLL               |\n");
	 printf("\n\t\t------------------------------------------\n");
	 printf("\t\tName                      : %s %s\n",fname,lname);
	 printf("\t\tNo. of hours worked       : %f\n",workhour);
	 printf("\t\tGross Salary              : %f\n",gsalary);
	 printf("\t\tNet Salary                : %f\n",salary);
	 printf("\t\t------------------------------------------\n");
   }
   if(found == 0)
   {
    printf("\n\t\t EMPLOYEE %d NOT FOUND!\n",payemp);
   }
   getch();
  }
 }while(payrollmenu != 4);
 return 0;
}

int payroll_system_menu()
{
 int cho;
 clrscr();
 printf("\n\t\t******************************************");
 printf("\n\t\t******* P A Y R O L L   S Y S T E M ******");
 printf("\n\t\t******************************************");
 printf("\n\n\t\t [1] Register New Employees\n");
 printf("\t\t [2] Search Employees\n");
 printf("\t\t [3] Create Payroll\n");
 printf("\t\t [4] Exit\n");
 printf("\n\t\t Enter your choice: ");
 scanf("%d",&cho);
 return cho;
}

Hope you guys can help me with this. Thanks! :)

Look closely at line 157 and you will see that it is attempting to use salrate as if it were a single object, not as an array. You have to change either line 157 or line 17, but you can't use it both ways.