Sales Comissions

A company pays its salespeople on a commission basis. The salespeople receive $200 per week plus 9% of their gross sales for that week.
Program below determines how many of the salespeople earned salaries in each of the following ranges.

• $200-299
• $300-399
• $400-499
• $500-599
• $600-699
• $700-799
• $800-899
• $900-999
• $1000 and over

[ Note: The salespeoples' gross sales is stored in gross[], there is no input needed. ]

/*
   title: salesComission
   coder: aeriqusyairi
   date: Jan25 2012
*/
#include<stdio.h>
#define SALESPERSON 20
#define RANGE 9
  
void calculateSalary( int b[] );
void calculateRange( const int b[], int a[] );
 
int main(){
   int gross[ SALESPERSON ] = { 3000, 4000, 7000, 8000, 10000, 30000, 500, 6000, 4000, 7000,
                                5000, 1500, 400, 15000, 2000, 50000, 3000, 40000, 5000, 10000 };
   int salaryRange[ RANGE ] = { 0 };
   
   int i, j, k;
   
   calculateSalary( gross );
   
   calculateRange( gross, salaryRange );
   
   for(i = 0, j = 200, k = 299 ; i < RANGE; i++, j += 100, k += 100 ){
      if(k < 1000)
         printf("%d salesperson earn salary between %d and %d.\n", salaryRange[ i ], j, k );
      else
         printf("%d salesperson earn salary of %d and over.\n", salaryRange[ i ], j );      
   }
   
   system("pause");
   return 0;
}

void calculateSalary( int b[] ){
   int i;
   
   for(i = 0; i < SALESPERSON; i++){
      b[ i ] *= 0.09;
      b[ i ] += 200;      
   }     
   
}

void calculateRange( const int b[], int a[] ){
   int i;
     
   for(i = 0; i < SALESPERSON; i++ ){
      if( b[i] >= 200 && b[ i ] < 300 )
         a[ 0 ]++;
      else if( b[i] >= 300 && b[ i ] < 400 )
         a[ 1 ]++;
      else if( b[i] >= 400 && b[ i ] < 500 )
         a[ 2 ]++;
      else if( b[i] >= 500 && b[ i ] < 600 )
         a[ 3 ]++;
      else if( b[i] >= 600 && b[ i ] < 700 )
         a[ 4 ]++;
      else if( b[i] >= 700 && b[ i ] < 800 )
         a[ 5 ]++;
      else if( b[i] >= 800 && b[ i ] < 900 )
         a[ 6 ]++;
      else if( b[i] >= 900 && b[ i ] < 1000 )
         a[ 7 ]++;
      else if( b[i] >= 1000 )
         a[ 8 ]++;       
   }
        
}