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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;
}
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