4、%d",&a);if(a%2==0)printf("%disoushu.",a);elseprintf("%disjishu.",a);}3、编写程序，实现从键盘上输入3个整数a,b,c，并输出其中最大的数。main(){inta,b,c,max;scanf("%d,%d,%d",&a,&b,&c);max=a>b?a:b;max=max>c?max:c;15printf("maxis%d",max);}main(){inta,b,c,max;scanf("%d,%d,%d",&a,&b,&c)
5、;if(a>b)max=a;elsemax=b;if(c>max)max=c;printf("maxis%d",max);}main(){inta,b,c,max;scanf("%d,%d,%d",&a,&b,&c);if(a>b)if(a>c)max=a;elsemax=c;elseif(b>c)max=b;elsemax=c;printf("maxis%d",max);}1、编写程序，实现从键盘上输入4个整数，并按从大到小顺序输出。main(){inta,b,c,d,t;scanf("%d,%d
6、,%d,%d",&a,&b,&c,&d);if(a>b){t=a;a=b;b=t;}15if(a>c){t=a;a=c;c=t;}if(a>d){t=a;a=d;d=t;}if(b>c){t=b;b=c;c=t;}if(b>d){t=b;b=d;d=t;}if(c>d){t=c;c=d;d=t;}printf("sortedbysmalltolarge:%d,%d,%d,%d",a,b,c,d);}1、完成下列分段函数的计算：分别使用if－elseif和if-if的嵌套结构来实现。方法一（用if——el
7、seif结构表达）#include#includemain(){intx,y;clrscr();printf("Pleaseinputvalueofx:");scanf("%d",&x);if(x<0)y=1;elseif(x>10)y=x*x+x+1;elsey=x+1;printf("x=%d,y=%d",x,y);}方法二（用if——if结构表达）15#include#includemain(){intx,y;clrscr
8、();printf("Pleaseinputvalueofx:");scanf("%d",&x);if(x<=10)if(x<0)y=1;elsey=x+1;elsey=x*x+x+1;printf("x=%d,y=%d",x,y);}1、编写一个程序，判断从键盘上输入的一个年份是否为闰年？方法一:#include#includemain(){intyear;clrscr();printf("Pleaseinputayear:");scanf("%d",&ye
9、ar);if(year%4==0&&year%100!=0
10、
11、year%400==0)printf("%disaleapyear",year);elseprintf("%disnotaleapyear",year);}方法二:(用ifif结构表达)15#include#includemain(){intyear,leap;clrscr();printf("Pleaseinputayear:");scanf("%d",&year);if(year%4==0)if
12、(year%100==0)if(year%400==0)leap=1;elseleap=0;elseleap=1;elseleap=0;if(leap==1)printf("%disaleapyear",year);elseprintf("%disnotaleapyear",year);}方法三:(用ifelseif结构表达)#include#includemain()
