www.pudn.com > c.rar > const.c

/* Demonstrates variables and constants */ 
#include  
 
/* Define a constant to convert from pounds to grams */ 
#define GRAMS_PER_POUND 454 
 
/* Define a constant for the start of the next century */ 
const int TARGET_YEAR = 2010; 
 
/* Declare the needed variables */ 
long weight_in_grams, weight_in_pounds; 
int year_of_birth, age_in_2010; 
 
int main( void ) 
{ 
    /* Input data from user */ 
 
    printf("Enter your weight in pounds: "); 
    scanf("%d", &weight_in_pounds); 
    printf("Enter your year of birth: "); 
    scanf("%d", &year_of_birth); 
 
    /* Perform conversions */ 
 
    weight_in_grams = weight_in_pounds * GRAMS_PER_POUND; 
    age_in_2010 = TARGET_YEAR - year_of_birth; 
 
    /* Display results on the screen */ 
 
    printf("\nYour weight in grams = %ld", weight_in_grams); 
    printf("\nIn 2010 you will be %d years old\n", age_in_2010); 
 
    return 0; 
}