C语言部分编程题.doc

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1、数字反序#include"stdio.h"voidmain(){intx,a,b,c;printf("inputx");scanf("%d",&x);if(x>99&&x<1000){a=x/100;b=x/10%10;c=x%10;printf("%d%d%d",c,b,a);}elseprintf("error");}#include"stdio.h"三#include"math.h"角voidmain()形{面floata,b,c,area,s;积printf("inputabc");scanf("%f%f%f",&

2、a,&b,&c);if(a+b>c&&a+c>b&&b+c>a){s=(a+b+c)/2;area=sqrt(s*(s-a)*(s-b)*(s-c));printf("area=%f",area);}elseprintf("itiswrong");}#include"stdio.h"voidmain()年{inti,d,year,mouth,day;月intsum=0;printf("inputyearmouthday");日scanf("%d%d%d",&year,&mouth,&day);for(i=1;i

3、++){switch(i){case1:case3:case5:case7:case8:case10:d=31;break;case4:case6:case9:case11:d=30;break;case2:if(year%4==0&&year%100!=0

4、

5、year%400==0)d=29;elsed=28;}sum=sum+d;}sum=sum+day;printf("sum=%d",sum);}#include"stdio.h"intf(intx);素voidmain(){intx;printf("inputx");数

6、scanf("%d",&x);if(f(x))printf("itis");elseprintf("itisnot");}intf(intx){inti,s=1;for(i=2;i<=x/2;i++){if(x%i==0)s=0;break;}returns;}Sn=8+88+888+8888#include"stdio.h"voidmain(){longi,a,n,sum=0,sn=0;printf(“输入a,n”);scanf(“%d%d”,&a,&n);for(i=1;i<=n;i++){sum=sum*10+a;sn=sn

7、+sum;}printf(“sn=%d”,sn);}水仙花数#include"stdio.h"voidmain(){intn,x,y,z;printf(“Theresultis:”);for(x=1;x<=9;x++){for(y=0;y<=9;y++){for(z=0;z<=9;z++){if(x*x*x+y*y*y+z*z*z==100*x+10*y+z){printf(“%dt”,100*x+10*y+z);}}}}printf(“”);}硬币的换法#include"stdio.h"voidmain(){intx,

8、y,z;for(x=5;x<=65;x+=5){for(y=5;y<=35;y+=5){for(z=5;z<=17;z+=5){if(x+y*2+z*5==100)printf(“1分=%d个2分=%d个5分=%d个”,x,y,z);}}}}ASCII码#include"stdio.h"voidmain(){charx;scanf("%c",&x);if(x<='9')printf("%c",x);elseprintf("ASCII=%d",x);}