【带你学c带你飞】3day第2章 用C语言编写程序（练习 2.3 计算分段函数）

#include
int main(){
    int year,month,day;
    scanf("%d-%d-%d",&month,&day,&year);
    printf("%d-%02d-%02d",year,month,day);

    return 0;
}

#include 
int main()
{
  double x,y;

  scanf("%lf",&x);
  if(x<=15){y=4.0*x/3.0;}
  else{y=2.5*x-10.5;}
  printf("f(%.2f) = %.2f",x,y);
  return 0;
}

#include 
#include
int main()
{
    //输入在一行中顺序给出两个正整数money、year和一个正实数rate，以空格分隔
    int money,year;
    double sum,rate;
    scanf("%d %d %lf",&money,&year,&rate);
    //pow(1+rate,year)意思是1+rate的year字幂
    sum=money*pow(1+rate,year);
    
    printf("sum = %0.2f",sum);
    
    return 0;
}