4、0)printf("%disoushu.",a);elseprintf("%disjishu.",a);}3、編寫程序，實(shí)現(xiàn)從鍵盤上輸入3個(gè)整數(shù)a,b,c，并輸出其中最大的數(shù)。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);if(a>b)max=a;elsemax=b;if(c>max
5、)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、編寫程序，實(shí)現(xiàn)從鍵盤上輸入4個(gè)整數(shù)，并按從大到小順序輸出。main(){inta,b,c,d,t;scanf("%d,%d,%d,%d",&a,&b,&c,&d);if(a>b){t=a;a=b;b=t;}15if(a
6、>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、完成下列分段函數(shù)的計(jì)算：分別使用if－elseif和if-if的嵌套結(jié)構(gòu)來實(shí)現(xiàn)。方法一（用if——elseif結(jié)構(gòu)表達(dá)）#include#includemain(){intx,y;clrscr(
7、);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結(jié)構(gòu)表達(dá)）15#include#includemain(){intx,y;clrscr();printf("Pleaseinputvalueofx:");scanf("%d",&x);if(x<=10)if(x<0)y=1;elsey=x+1
8、;elsey=x*x+x+1;printf("x=%d,y=%d",x,y);}1、編寫一個(gè)程序，判斷從鍵盤上輸入的一個(gè)年份是否為閏年？方法一:#include#includemain(){intyear;clrscr();printf("Pleaseinputayear:");scanf("%d",&year);if(year%4==0&&year%100!=0
9、
10、year%400==0)printf("%disaleapyear",year);elseprintf("%disnotale
11、apyear",year);}方法二:(用ifif結(jié)構(gòu)表達(dá))15#include#includemain(){intyear,leap;clrscr();printf("Pleaseinputayear:");scanf("%d",&year);if(year%4==0)if(year%100==0)if(year%400==0)leap=1;elseleap=0;elseleap=1;elseleap=0;if(leap==1)printf("%disaleapyear",year);el
12、seprintf("%disnotaleapyear",year);}方法三:(用ifelseif結(jié)構(gòu)表達(dá))#include#includemain()
