摘要：
# include <stdio.h> int main() {int a,b,profit; float rate,tax; printf("input a's number:"); scanf("%d",&a); if(a>=5000) rate=0.15; else b=a/500; swit 阅读全文
摘要：
# include <stdio.h> int main() {double a=0.0,b=0.0,c=0.0; printf("input three numbers:"); scanf("%lf,%lf,%lf",&a,&b,&c); if(a==b&&b==c&&a==c) printf(" 阅读全文
摘要：
# include <stdio.h> int main() {int year,month=2,days; printf("input the year:"); scanf("%d",&year); if(((year%100!=0)&&(year%4==0))||((year%100==0)&& 阅读全文
摘要：
# include <stdio.h>int main(){int a,b,c,d,e;a=getchar();b=getchar();c=getchar();d=getchar();e=getchar();putchar(a);putchar(b);putchar(c);putchar(d);pu 阅读全文