Answer to Question #39505 in C++ for Verasak Sitawan

Question

Write C++ function named customerCreditLimit()that accepts a double as a parameter
and displays the value as the amount of credit granted to a customer. Provide a default
value for the function so that if a program calls the function without using an argument,
the credit limit displays $500. Write a main()function that proves the function works
correctly, whether it is called with an argument or without.

Answer 1

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

void customerCreditLimit( double val=500) /*default parameter*/ 
{    
     printf("$%5.3f\n",val); 
}
int main ()  /* main function*/ 
{    
     char s[128];    
     printf ("enter amount of credit or 'e' for default: ");    
     scanf("%s",s);    
     if ( strcmp(s,"e") == 0 )        
         customerCreditLimit(); /*print default value*/    
     else         
         customerCreditLimit(atof(s)); /*print user value*/    
     system ("pause");    
     return 0; 
 }