C語言程序設(shè)計(jì)入門源代碼代碼集合

1、#include <> void print_star(void)printf("*n");void print_welcome(void)printf("C language,welcome!n");void main()print_star();print_welcome();print_star();getchar();演示2#include "" int sum(int i,int j)return(i + j);void main()int n1,n2;printf("input 2 numbers:n

2、");scanf("%d%d",&n1,&n2);printf("the sum = %dn",sum(n1,n2);getchar();演示3#include "" int maxnum(int,int,int);main()int a,b,c;printf("Please enter 3 numbers:n");scanf("%d,%d,%d",&a,&b,&c);printf("Maxnum is %dn",maxnum

3、(a,b,c);return 0;int maxnum(int x,int y,int z)int max=x;if(y>max)max = y;if(z>max)max = z;return max;演示4#include <> int s1(int n)int j,s;s=0;for(j=1;j<=n;j+) s=s+j;return s;int sum(int n)int i,s=0;for(i=1;i<=n;i+)s=s+s1(i); return s;void main()int n;printf("n:"); scanf(&q

4、uot;%d",&n);printf("s=%dn",sum(n);演示5#include <>void func(int n)int i;for(i=n-1;i>=1;i-) n=n+i;printf("n=%d'n",n);void main()int n;printf("Input n:"); scanf("%d",&n); func(n);printf("n=%d'n",n);演示6#include <>void s

5、wap(int a,int b)int temp;temp=a;a=b;b=temp;printf("swap : a=%d,b=%dn",a,b);void main()int a,b;a=3;b=10;swap(a,b);printf("a=%d,b=%dn",a,b);演示7#include <>int func(int a,int b)int c;c=a+b;return c;void main()int x=6,y=7,z=8,r;r=func(x-,y+,x+y),z-); printf("%dn",r);演示

6、8#include <>max(float x,float y)return x>y x:y;void main()printf("%dn",max(2,);演示9#include <>int sum(int n)int i,s=0;for(i=0;i<=n;i+) s=s+i;return s;void main()int m,sn;scanf("%d",&m);sn=sum(m);printf("the sum is %dn",sn);演示10#include <>void

7、swap(int x,int y);int main()int a,b;printf("input 2 numbers :n");scanf("%d,%d",&a,&b);printf("input number is:a=%d,b=%d n",a,b);swap(a,b);printf("input 2 numbers is:a=%d,b=%dn",a,b);return 0;void swap(int x,int y)int temp;temp = x;x = y;y = temp;printf

8、("swap number is : x = %d,y = %d n",x,y);演示11#include ""#define K 3#define N 5long f2(int n,int k)long power = n;int i;for(i=1;i<k;i+)power *=n;return power;long f1(int n,int k)long sum = 0 ;int i;for(i=1;i<=n;i+)sum = sum + f2(i,k);return sum;int main(void)printf("sum

9、 of %d power of integer from 1 to %d = ",K,N);printf("%ld'n"巾(N,K);return 0;演示12#include <>int min(int a,int b);int main(void)int j,k,mininum;printf("input 2 integers:");scanf("%d,%d",&j,&k);mininum = min(j,k);printf("n of the two values %d a

10、nd %d,the mininum is %dn",j,k,mininum);return 0;int min(int a,int b)if(a<b)return a;elsereturn b;#include <>int func(int a,int b);void main()int k=4,m=1,p;p=func(k,m);printf("%dn",p);int func(int a,int b)int m=0,i=2; i+=m+1; m=i+a+b; return m;演示14#include <>int max(int

11、x,int y)int z;z=x>yx:y;return z;void main()extern int A,B; /聲明外部變量printf("%dn",max(A,B);int A=13,B=-8;/定義外部變量演示15#include <>int f1(int xb)extern int xa;return (xa*xb);int main(void)extern int xb;int xa = 5;printf("xa=%d,xb=%d,result=%d",xa,xb,f1(xa);return 0;int xa = 3,x

12、b = 4;演示16#include <>void num()extern int x,y;int a=15,b=10;x=a-b;y=a+b;int x,y;void main()int a=7,b=5; x=a+b;y=a-b;num();printf("%d,%dn",x,y);演示17 #include <> void main()void swap();extern int a,b;a=3;b=10;swap()；printf("a=%d,b=%dn",a,b);int a,b;void swap()int temp;t

13、emp=a;a=b;b=temp;演示18#include <>void auto_static(void)int var_auto = 0;static int var_static = 0;printf("var_auto = %d,var_static = %dn",var_auto+,var_static+);void main()int i;for (i=0;i<3;i+)auto_static();演示19#include <>void swap(int x,int y)int t;t=x;x=y;y=t;void main()in

14、t a,b;scanf("%d,%d",&a,&b);swap(a,b);printf("%d,%dn",a,b);#include <>int x,y;void swap(int , ,int)int t;t=x;x=y;y=t;void main()scanf("%d,%d",&x,&y);swap(x,y);printf("%d,%dn",x,y);#include <>int x,y;void swap(int x,int y)int t;t=x;x=

15、y;y=t;void main()scanf("%d,%d",&x,&y);swap(x,y);printf("%d,%dn",x,y);演示20#include <> int fac(int n)static int f=1;f=f*n;return f;void main()int i;for(i=1;i<=5;i+)printf("%d!=%dn",i,fac(i);演示21#include ""int main(void)int a = 2;int p = a;printf

16、("%dn",a);int a =7;printf("%dn",a);printf("%dn",p);printf("%dn",+a);return 0;演示22#include <>int func(int a,int b);void main()int k=4,m=1,p;p=func(k,m);printf("%d,",p);p=func(k,m);printf("%dn",p);int func(int a,int b)static int m=0,i=2

17、;i+=m+1;m=i+a+b;return m;演示23#include <>f(int n)int c;if(n=6)c=1;elsec=(f(n+1)+1)*2;return c;void main()printf("%dn",f(1);演示24#include <>long power(int n)long f;if(n>1)f=power(n-1)*n;elsef=1;return f;main()int n;long x;printf("input an integer number:n");scanf(&quo

18、t;%d",&n);x=power(n);printf("%d!=%ldn",n,x);getchar();演示25#include <>int fact()static int i=5;if(i=0) return 1;elsei-;return (i+1)*fact();void main()printf("fact=%dn",fact();演示26#include <>int fun(int k);int w=3;void main()int w=10;printf("%dn",fun(

19、5)*w);int fun(int k)if(k=0) return w;return(fun(k-1)*k);演示27#include <>int fac(int n)register int i,f=1;for(i=1;i<=n;i+)f=f*i;return f;main()int i;for(i=1;i<=5;i+)printf("%d!=%dn",i,fac(i);#include <>age(int n)int c;if(n=1)c=10;elsec=age(n-1)+2;return c;void main()printf(

20、"%dn",age(5);演示29#include <>#define PI#define circuit(r) 2*PI*r#define area(r) PI*r*rvoid main()float ra,c,a;scanf("%f",&ra);c=circuit(ra);a=area(ra);printf("ra=%f,c=%f,a=%f",ra,c,a);漢諾塔(演示30)#include ""void move(int,char,char,char);int main(void)int n;printf("input n disk on tower A:n");scanf("%d",&n);move(n,'A','B','C'