例子：#includemain(){tips();/*caller*/printf(“\nSuccessisaboutbangingonafterothershaveletgo”);}tips()/*caller*/{printf(“\nWhenyoureachtheendoftheropetieaknot&hangon”,)0;}[上述程序的输出结果如下：Whenyoureachtheendoftheropttieaknot&hangon.Successisabouthangingonafterothershaveletgo.]#includemain(){inta,fact;printf(“\nEnteranynumber”);scanf(“%d”,&a);fact=rec(a);printf(“Factorialvalueis%d”,fact);}rec(x);intx;{intf;if(x==1)return(1);elsef=x*rec(x-1);return(f);}[其显示的结果为：Factorialvalueis2.]比较两个数较大的那个：#includemain(){inta,b,max;scanf(“%d%d”,&a,&b);if(a>b)max=a;elsemax=b;printf(“%d”,max);}输出a+b的值：#includevoidmain(){inta,b,x;scanf(“%d%d”,&a,&b);x=a+b;printf(“%d”,x);}输出a,b中最大的一位数：#includeintmax(intx,inty){intz;if(x>y)z=x;elsez=y;return(z);}voidmain(){inta,b,c;scanf(“%d%d”,&a,&b);c=max(a,b);printf(“%d\n”,c);}输出Hello:#includeintmain(){printf(“Hello!”);return0;}求1~100的和：#includeintmain(){ints,n;s=0,n=1;A:s=s+n;n=n+1;if(n<=100)gotoA;printf(“%d”,s);}请输入一个三位数，将其各位逆序输出：（如153，输出351）#includevoidmain(){intx,y,a,b,c;printf("请输入一个三位数的数：");scanf("%d",&x);a=x/100;b=x%100/10;c=x%10;y=c*100+b*10+a;printf("\n%d",y);}#includevoidmain(){intx,a,b,c,d;printf("请输入一个三位数的数：");scanf("%d",&x);a=x/100;b=x%100/10;c=x%10;d=c*100+b*10+a;printf("\n%d\n",d);}买鸡：#includevoidmain(){intx,y,z;if(x>=0&&x<=19,y>=0&&y<=33,z>=0&&z<=100)while(x=19){x=0;5*x+3*y+z/3==100&&x+y+z==100;x=x+1;}printf("%d%d%d",x,y,z);}y==(100-5*x-z/3)/3&&y==100-x-z;z==(100-5*x-3*y)*3&&z==100-x-y;#includevoidmain(){intx=0,y,z;while(x<=19){5*x+3*y+z/3==100&&x+y+z==100;x=x+1;printf("%d%d%d",x,y,z);}}#includevoidmain(){intx=0,y=0,z=0;while(x<=19){while(y<=33){while(z<=100){z==(100-5*x-3*y)*3&&z==100-x-y;z=z+1;printf("%d\t",z);}y==(100-5*x-z/3)/3&&y==100-x-z;y=y+1;printf("%d\t",y);}x=x+1;printf("%d\t",x);}}计算x=20+3(x-1):#includevoidmain(){intage(intx)inti,j;scanf(“%d”,&i);j=age(i);printf(“age=%d\n”,j);}intage(intx){intz;if(x==1)z=20;elsez=age(x-1)+3;return(z);}编写程序求圆柱体的表面积和体积：#include#definePI3.14/*定义PI为符号常量，值为3.14*/voidmain(){floatr,h,s,v;printf(“请输入半径r和高h的值：\n”);scanf(“%f%f”,&r,&h);/*输入半径r和高h*/s=2*PI*r*h;/*计算圆柱体表面积*/v=PI*r*r*h;/*计算圆柱体体积*/printf(“s=%f,v=%f\n”,s,v);}自增，自减运算符的使用：#includevoidmain(){inti=5,j=5;intx,y;x=i++;y=++j;printf(“%d\t%d\n”,-x++,-(++y));printf(“%d\t%d\t%d\t%d\n”,i,j,x,y);}自增、自减运算符的基本运算：#includevoidmain(){intk=4;intx,y,z;x=18-k++;printf(“x=%d”,x);printf(“k=%d\n”,k);y=++k+6;printf(“y=%d”,y);printf(“k=%d\n”,k);z=++k+k++;printf(“z=%d\n”,z);}结果：x=14,k=5;y=12,k=6;z=14.输出单个字符：#includevoidmain(){chara,b;a=’o’;b=’k’;putchar(a);putchar(b);putchar(‘\n’);}输入字符举例：#includevoidmain(){charc;c=getchar();/*从键盘读入一个字符*/putchar(c);/*显示输入的字符*/}猜数游戏：#include#include#includeintmain(){intx,i=0,guess;srand(time(NULL));x=rand()%100+1;printf("请你猜数：");do{scanf("%d",&guess);if(xguess)printf("你猜小了！\n");else{printf("你赢了！\n");break;}}i++;if(i>=10){printf("随机数是：%d\n",x);printf("你已经猜错了10次，我赢了，哈哈！\n");break;}printf("请你再猜：");}while(1);}#includevoidmain(){inta=2,*p=&a,*q=&a;Printf("%d,%d\n",*p++,*(q++));P=&a;q=&;Printf("%d%d\n",*p,(*q)++);Printf("%d%d\n",*p,++(*q);}结果为：2,22,24,4(从又向左算）#includeVoidmain(){Inta,b,c;Int*pa,*pb,*pc;Pa=&a;pb=&b;pc=&c;Scanf("%d%d",pa,pb);Printf("a=%d,b=%d\n",*pa,*pb);C=a+b;Printf("c=%d\n",*pc);*pc=a+*pb;Printf("c=%d从100到200之间有哪些数除4多2，除7多3，除9多5？#includeintmain(){for(inti=100;i<=200;i++)if(i%4==2&&i%7==3&&i%9==5)printf("%d\n",i);return0;}用选择法对10个整数排序：#includeVoidmain(){Int*p,i,a[10];P=a;For(i=0;i<10;i++)Scanf(
