C语言程序设计-入门源代码代码集合

1、演示1#include<stdio.h>voidprint_star(void)(printf("*n");voidprint_welcome(void)(printf("Clanguage,welcome!n");voidmain()(print_star();print_welcome();print_star();getchar();演示2#include"stdio.h"intsum(inti,intj)(return(i+j);voidmain()(intn1,n2;printf("input2numb

2、ers:n");scanf("%d%d",&n1,&n2);printf("thesum=%dn",sum(n1,n2);getchar();演示3#include"stdio.h"intmaxnum(int,int,int);main()(inta,b,c;printf("Pleaseenter3numbers:n");scanf("%d,%d,%d",&a,&b,&c);printf("Maxnumis%dn",maxnu

3、m(a,b,c);return0;)intmaxnum(intx,inty,intz)(intmax=x;if(y>max)max=y;if(z>max)max=z;returnmax;)演示4#include<stdio.h>ints1(intn)(intj,s;s=0;for(j=1;j<=n;j+)s=s+j;returns;)intsum(intn)(inti,s=0;for(i=1;i<=n;i+)s=s+s1(i);returns;)voidmain()(intn;printf("n:");scanf("%d&quo

4、t;,&n);printf("s=%dn",sum(n);)演示5#include<stdio.h>voidfunc(intn)(inti;for(i=n-1;i>=1;i-)n=n+i;printf("n=%d'n",n);voidmain()(intn;printf("Inputn:");scanf("%d",&n);func(n);printf("n=%d'n",n);演示6#include<stdio.h>voidswap(i

5、nta,intb)(inttemp;temp=a;a=b;b=temp;printf("swap:a=%d,b=%dn",a,b);voidmain()(inta,b;a=3;b=10;swap(a,b);printf("a=%d,b=%dn",a,b);演示7#include<stdio.h>intfunc(inta,intb)(intc;c=a+b;returnc;voidmain()intx=6,y=7,z=8,r;r=func(x-,y+,x+y),z-);printf("%dn",r);演示8#include&l

6、t;stdio.h>max(floatx,floaty)(returnx>y?x:y;)voidmain()(printf("%dn",max(2,3.5);)演示9#include<stdio.h>intsum(intn)(inti,s=0;for(i=0;i<=n;i+)s=s+i;returns;)voidmain()(intm,sn;scanf("%d",&m);sn=sum(m);printf("thesumis%dn",sn);)演示10#include<stdio.h>v

7、oidswap(intx,inty);intmain()(inta,b;printf("input2numbers:n");scanf("%d,%d",&a,&b);printf("inputnumberis:a=%d,b=%dn",a,b);swap(a,b);printf("input2numbersis:a=%d,b=%dn",a,b);return0;)voidswap(intx,inty)inttemp;temp=x;x=y;y=temp;printf("swapnumberis

8、:x=%d,y=%dn",x,y);)演示11#include"stdio.h"#defineK3#defineN5longf2(intn,intk)longpower=n;inti;for(i=1;i<k;i+)power*=n;returnpower;)longf1(intn,intk)longsum=0;inti;for(i=1;i<=n;i+)sum=sum+f2(i,k);returnsum;)intmain(void)printf("sumof%dpowerofintegerfrom1to%d=",K,N);printf

9、("%ldn",f1(N,K);return0;)演示12#include<stdio.h>intmin(inta,intb);intmain(void)(intj,k,mininum;printf("input2integers:");scanf("%d,%d",&j,&k);mininum=min(j,k);printf("nofthetwovalues%dand%d,themininumis%dn",j,k,mininum);return0;intmin(inta,intb)(if

10、(a<b)returna;elsereturnb;演示13#include<stdio.h>intfunc(inta,intb);voidmain()(intk=4,m=1,p;p=func(k,m);printf("%dn",p);intfunc(inta,intb)(intm=0,i=2;i+=m+1;m=i+a+b;returnm;演示14#include<stdio.h>intmax(intx,inty)(intz;z=x>y?x:y;returnz;voidmain()(externintA,B;/声明外部变量printf(&q

11、uot;%dn",max(A,B);)intA=13,B=-8;/定义外部变量演示15#include<stdio.h>intf1(intxb)(externintxa;return(xa*xb);)intmain(void)(externintxb;intxa=5;printf("xa=%d,xb=%d,result=%d",xa,xb,f1(xa);return0;)intxa=3,xb=4;演示16#include<stdio.h>voidnum()(externintx,y;inta=15,b=10;x=a-b;y=a+b;)int

12、x,y;voidmain()(inta=7,b=5;x=a+b;y=a-b;num();printf("%d,%dn",x,y);)演示17#include<stdio.h>voidmain()voidswap();externinta,b;a=3;b=10;swap();printf("a=%d,b=%dn",a,b);)inta,b;voidswap()(inttemp;temp=a;a=b;b=temp;#include<stdio.h>voidauto_static(void)(intvar_auto=0;staticin

13、tvar_static=0;printf("var_auto=%d,var_static=%dn",var_auto+,var_static+);)voidmain()(inti;for(i=0;i<3;i+)auto_static();)演示19#include<stdio.h>voidswap(intx,inty)(intt;t=x;x=y;y=t;)voidmain()(inta,b;scanf("%d,%d",&a,&b);swap(a,b);printf("%d,%dn",a,b);#inc

14、lude<stdio.h>intx,y;voidswap(int,int)(intt;t=x;x=y;y=t;voidmain()(scanf("%d,%d",&x,&y);swap(x,y);printf("%d,%dn",x,y);#include<stdio.h>intx,y;voidswap(intx,inty)(intt;t=x;x=y;y=t;voidmain()(scanf("%d,%d",&x,&y);swap(x,y);printf("%d,%dn&q

15、uot;,x,y);演示20#include<stdio.h>intfac(intn)(staticintf=1;f=f*n;returnf;voidmain()(inti;for(i=1;i<=5;i+)printf("%d!=%dn",i,fac(i);)演示21#include"stdio.h"intmain(void)(inta=2;intp=a;printf("%dn",a);(inta=7;printf("%dn",a);printf("%dn",p);)print

16、f("%dn",+a);return0;)演示22#include<stdio.h>intfunc(inta,intb);voidmain()(intk=4,m=1,p;p=func(k,m);printf("%d,",p);p=func(k,m);printf("%dn",p);)intfunc(inta,intb)(staticintm=0,i=2;i+=m+1;m=i+a+b;returnm;)#include<stdio.h>f(intn)(intc;if(n=6)c=1;elsec=(f(n+1)+1

17、)*2;returnc;)voidmain()(printf("%dn",f(1);)演示24#include<stdio.h>longpower(intn)(longf;if(n>1)f=power(n-1)*n;elsef=1;returnf;)main()(intn;longx;printf("inputanintegernumber:n");scanf("%d",&n);x=power(n);printf("%d!=%ldn",n,x);getchar();)演示25#includ

18、e<stdio.h>intfact()(staticinti=5;if(i=0)return1;else(i-;return(i+1)*fact();)voidmain()(printf("fact=%dn",fact();)演示26#include<stdio.h>intfun(intk);intw=3;voidmain()(intw=10;printf("%dn",fun(5)*w);)intfun(intk)(if(k=0)returnw;return(fun(k-1)*k);)演示27#include<stdio.h

19、>intfac(intn)(registerinti,f=1;for(i=1;i<=n;i+)f=f*i;returnf;)main()(inti;for(i=1;i<=5;i+)printf("%d!=%dn",i,fac(i);)演示28#include<stdio.h>age(intn)(intc;if(n=1)c=10;elsec=age(n-1)+2;returnc;)voidmain()(printf("%dn",age(5);)演示29#include<stdio.h>#definePI3.14#d

20、efinecircuit(r)2*PI*r#definearea(r)PI*r*rvoidmain()(floatra,c,a;scanf("%f",&ra);c=circuit(ra);a=area(ra);printf("ra=%f,c=%f,a=%f",ra,c,a);)汉诺塔(演示30)#include"stdio.h"voidmove(int,char,char,char);intmain(void)(intn;printf("inputndiskontowerA:n");scanf("%d",&n);move(n,'A','B','C