实验3 C语言函数应用编程

实验任务1：

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<windows.h>
#define N 80

void print_text(int line,int col,char text[]);
void print_spaces(int n);
void print_blank_lines(int n);

int main()
{
    int line,col,i;
    char text[N]="hi,November~";
    srand(time(0));
    
    for(i=1;i<=10;++i){
        line=rand()%25;
        col=rand()%80;
        print_text(line,col,text);
        Sleep(1000);
    }
    return 0;
    
    }
    
    void print_spaces(int n){
        int i;
        for(i=1;i<=n;++i)
        printf(" ");
    }
    
void print_blank_lines(int n){
    int i;
    for(i=1;i<=n;++i)
      printf("\n");
}

void print_text(int line,int col,char text[]){
    print_blank_lines(line-1);
    print_spaces(col-1);
    printf("%s",text);
}
    

功能：随机位置输出一段文字

实验任务2：

#include<stdio.h>
long long fac(int n);

int main(){
    int i,n;
    printf("Enter n:");
    scanf("%d",&n);
    for(i=1;i<=n;++i)
      printf("%d!=%lld\n",i,fac(i));
      
      return 0;
}

long long fac(int n){
    static long long p=1;
    printf("p=%lld\n",p);
    p=p*n;
    
    return p;
}

2_c:

#include <stdio.h>
int func(int, int);        // 函数声明

int main() {
    int k = 4, m = 1, p1, p2;

    p1 = func(k, m);    // 函数调用
    p2 = func(k, m);    // 函数调用
    printf("%d, %d\n", p1, p2);

    return 0;
}

// 函数定义
int func(int a, int b) {
    static int m = 0, i = 2;

    i += m + 1;
    m = i + a + b;

    return m;
}

一致

变量的值会随着计算的进行而改变

实验任务3：

#include <stdio.h>
long long func(int n);

int main() {
    int n;
    long long f;

    while (scanf("%d", &n) != EOF) {
        f = func(n);
        printf("n = %d, f = %lld\n", n, f);
    }

    return 0;
}

long long func(int n){
    if(n==0)
        return 0;
    else
       return ((func(n-1)+1)*2-1);
    
    
    
}

实验任务4：

#include <stdio.h>
int func(int n, int m);

int main() {
int n, m;

while(scanf("%d%d", &n, &m) != EOF)
printf("n = %d, m = %d, ans = %d\n", n, m, func(n, m));

return 0;
}

int func(int n,int m){
int i,d,u;
int ans;
u=1;d=1;

if(m==0)
ans=1;

else{
for(i=1;i<=m;++i){
d*=i;
}
for(i=n;i>=(n-m+1);--i){

u*=i;}

ans=u/d;}
return ans;
}

#include <stdio.h>
int func(int n, int m);

int main() {
    int n, m;

    while(scanf("%d%d", &n, &m) != EOF)
        printf("n = %d, m = %d, ans = %d\n", n, m, func(n, m));
    
    return 0;
}

int func(int n,int m){
    if(n<m)
      return 0;
    else if(m==0)
      return 1;
    
    else
      return(func(n-1,m)+func(n-1,m-1));
        
    }

实验任务5：

#include<stdio.h>
#include<stdlib.h>
void hanluota(unsigned int n,char a,char b,char c);
void yidong(unsigned int n,char a,char c);
int fun(int n);
int main(){
unsigned int n;int s;
while(scanf("%u",&n)!=EOF){

hanluota(n,'A','B','C');
s=fun(n);
printf("一共移动了%d次",s);
system("pause");}
return 0;

}
void hanluota(unsigned int n,char a,char b,char c){
int i;
i=1;
if(n==1){
yidong(n,a,c);


}
else{
hanluota(n-1,a,c,b);
yidong(n,a,b);
hanluota(n-1,b,a,c);


}

}
void yidong(unsigned int n,char a,char c){

printf("%u:%c-->%c\n",n,a,c);
}

int fun(int n){
if(n==1)
return 1;
else
return(fun(n-1)*2+1);
}

实验任务6：

#include<stdio.h>
#include<math.h>
long func(long s);

int main()
{
    long s,t;
    printf("Enter a number:");
    while(scanf("%ld",&s)!=EOF){
        t=func(s);
        printf("new number is:%ld\n\n",t);
        printf("Enter a number:");
    }
    return 0;
}

long func(long s){
    long ans;ans=0;
    while(s!=0){
    
   if((s%2)==0){
         s=s/10;
   }
   else{
        
        ans=ans*10+(s%10) ;
        s=s/10;
   }}
   s=ans;
   ans=0;
   while(s!=0){
    
   if((s%2)==0){
         s=s/10;
   }
   else{
        
        ans=ans*10+(s%10) ;
        s=s/10;
   }}
   
   return ans;
}