#include <stdio.h>
int main() {
float wei,sum;
char a;
scanf("%f %c",&wei,&a);
if(a=='y') sum=19.99+wei+5;
else sum=19.9+wei;
printf("%d",(int)sum);
}
(int) 取整

#include <stdio.h>
int main() {
float wei,sum;
char a;
scanf("%f %c",&wei,&a);
if(a=='y') sum=19.99+wei+5;
else sum=19.9+wei;
printf("%d",(int)sum);
}
(int) 取整