变量和常量的使用

变量和常量的使用示例。

#include <stdio.h>

#define GRAMS_PER_POUND 454

const int TARGET_YEAR = 2010;

long weight_in_grams, weight_in_pounds;

int year_of_birth, age_in_2010;

int main( void )
{
    printf(Enter your weight in pounds: );

    scanf(%d, &weight_in_pounds);

    printf(Enter your year of birth: );

    scanf(%d, &year_of_birth);

    weight_in_grams = weight_in_pounds * GRAMS_PER_POUND;

    age_in_2010 = TARGET_YEAR - year_of_birth;

    printf(\nYour weight in grams = %ld, weight_in_grams);

    printf(\nIn 2010 you will be %d years old\n, age_in_2010);

    return 0;
}