2、;}3.编写程序，使数组10个元素的值分别为0到9，然后逆序输出。#includemain(){inti,a[10];for(i=0;i<10;i++)a[i]=i;for(i=9;i>=0;i--)printf("%4d",a[i]);printf("");}4.从键盘输入10个数，找出最大值及其位置#includevoidmain(){intab[10],i,max,pos;for(i=0;i<10;i++)scanf("%d",&ab[i]);max=ab[0];pos
3、=0;for(i=1;i<10;i++)if(maxmain(){intt,a,b,c;scanf("%d",&t);a=(t-t%100)/100;c=(t%100)%10;b=(t%100-c)/10;if(t==a*a*a+b*b*b+c*c*c)printf("%d",t);elseprint
4、f("无效");}6.在3到1000的全部润年#includemain(){intyear;for(year=3;year<=1000;year++){if(!(year%4==0&&year%100!=0
5、
6、year%400==0))continue;printf(“%4d”,year);}}7.求1+2+3+4…+100之和#includemain(){inti,s;s=0;for(i=1;i<=100;i++)s=i+s;printf("s=%d",s);}或者#inclu
7、demain(){inti,s;s=0;i=1;do{s=s+i;i++;}while(i<=100);printf("s=%d,i=%d",s,i);}6.求n！#includemain(){intn,i,p=1;intn,i;scanf(“%d”,&n);for(i=1;i<=n;i++)p=p*i;printf(“%ld”,p);}8．输入三个实数a,b,c要求从小到大的顺序输出#includemain(){floata,b,c,t;scanf("
8、%f,%f,%f",&a,&b,&c);if(a>b){t=a;a=b;b=t;}if(a>c){t=a;a=c;b=t;}if(b>c){t=b;b=c;c=t;}printf("%5.2f,%5.2f,%5.2f",a,b,c);}9.判断年份是不是润年？#includemain(){intyear;printf("请输入年份");scanf("%d",&year);{if(year%4==0&&year%100!=0
9、
10、year%400==0)printf("%4d是闰年",year);
11、elseprintf("%4d不是润年",year);}}10.寻找1-999中的水仙花数#includemain(){inti,j,k;for(i=1;i<10;i++)for(j=0;j<10;j++)for(k=0;k<10;k++)if(i*100+j*10+k==i*i*i+j*j*j+k*k*k)printf("%dt",(i*100+j*10+k));}11.比较大小#includemain(){inta,b,c,max;scanf("%d%d%d",&a,&b,
12、&c);if(a>b)if(a>c)max=a;elsemax=c;elseif(b>c)max=b;elsemax=c;printf("max=%d",max);}12.任意输入一行大写字母，将它们转换成小写字母后输出。#includemain(){inti;charc;for(i=1;(c=getchar())!='';i++)
