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1、演示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 stdio.hint sum(int i,int j) return(i + j);void main() int n1,n2; printf(input 2 numbers:n); scanf(%d%d,&n1,&n2); printf(th
2、e sum = %dn,sum(n1,n2); getchar();演示3#include stdio.hint 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(a,b,c); return 0;int maxnum(int x,int y,int z) int max=x; if(ymax) max = y; if(zmax) max = z; return max;演示4#include
3、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(%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=%dn,n);void main()int n;printf(Input n:);scanf(%d,&n);fu
4、nc(n);printf(n=%dn,n);演示6#include void swap(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8#inc
5、lude max(float x,float y)return xy? x:y;void main()printf(%dn,max(2,3.5);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 swap(int x,int y);int main() int a,b; printf(input 2 numbers :n); scan
6、f(%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(swap number is : x = %d,y = %d n,x,y);演示11#include stdio.h#define K 3#define N 5long f2(int n,int k) long power =
7、 n; int i; for(i=1;ik;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 of %d power of integer from 1 to %d = ,K,N); printf(%ldn,f1(N,K); return 0;演示12#include int min(int a,int b);int main(void) int j,k,m
8、ininum; printf(input 2 integers:); scanf(%d,%d,&j,&k); mininum = min(j,k); printf(n of the two values %d and %d,the mininum is %dn,j,k,mininum); return 0;int min(int a,int b) if(ab) return a; else return b;演示13#include int func(int a,int b);void main() int k=4,m=1,p;p=func(k,m); printf(%dn,p);int fu
9、nc(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 x,int y)int z;z=xy?x:y;return z;void main()extern int A,B; /声明外部变量printf(%dn,max(A,B);int A=13,B=-8; /定义外部变量演示15#include int f1(int xb) extern int xa; return (xa*xb);int main(void) extern int xb; int xa = 5; printf(xa=%d
10、,xb=%d,result=%d,xa,xb,f1(xa); return 0;int xa = 3,xb = 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
11、()int temp;temp=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;i3;i+) auto_static();演示19#include void swap(int x,int y) int t; t=x;x=y;y=t; void main() int 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=y;y=t;
