实验四

任务一截图

 

任务二

#include<stdio.h>
#include<string.h>

#define N 80

void swap_str(char s1[N],char s2[N]);
void test1();
void test2();

int main(){
    printf("1:lianggeyiweicharshuzu\n");
    test1();
    
    printf("\n2:erweichar\n");
    test2();
    
    return 0;
}

void test1(){
    char views1[N]="hey,c,i,hate,u";
    char views2[N]="hey,c,i,love,u";
    
    printf("jiaohuanqian:\n");
    puts(views1);
    puts(views2);
    
    swap_str(views1,views2);
    
    printf("jiaohuanhou:\n");
    puts(views1);
    puts(views2);    
    
}

void test2(){
    char views[2][N]={"hey,c,i,hate,u",
                      "hey,c,i,love,u"};
                      
    printf("jiaohuanqian:\n");
    puts(views[0]);
    puts(views[1]);
    
    swap_str(views[0],views[1]);
    
    printf("jiaohuanhou:\n");
    puts(views[0]);
    puts(views[1]);    
    
    
}

void swap_str(char s1[N],char s2[N]){
    char tmp[N];
    
    strcpy(tmp,s1);
    strcpy(s1,s2);
    strcpy(s2,tmp);
}

截图

任务三

 

#include <stdio.h>

#define N 80

int count(char x[]);

int main() {
    char words[N+1];
    int n;

    while(gets(words) != NULL) {
        n = count(words);
        printf("单词数: %d\n\n", n);
    }

    return 0;
}

int count(char x[]) {
    int i;
    int word_flag = 0;  
    int number = 0;  

    for(i = 0; x[i] != '\0'; i++) {
        if(x[i] == ' ')
            word_flag = 0;
        else if(word_flag == 0) {
            word_flag = 1;
            number++;
        }
    }

    return number;
}

#include <stdio.h>
#define N 1000

int main() {
    char line[N];
    int word_len;   
    int max_len;    
    int end;       
    int i;

    while(gets(line) != NULL) {
        word_len = 0;
        max_len = 0;
        end = 0;

        i = 0;
        while(1) {
            
            while(line[i] == ' ') {
                word_len = 0; 
                i++;
            }

            
            while(line[i] != '\0' && line[i] != ' ') {
                word_len++;
                i++;
            }
        
     
            if(max_len < word_len) {
                max_len = word_len;
                end = i;  
            }

            if(line[i] == '\0')
                break;
        }

  
        printf("最长单词: ");
        for(i = end - max_len; i < end; ++i)
            printf("%c", line[i]);
        printf("\n\n");
    }

    return 0;
}

截图

 

 

 

 

 

 

 

 

任务四

#include<stdio.h>
#define N 100
void dec_to_n(int x,int n);

int main(){
    int x;
    
    printf("输入一个十进制整数:");
    while(scanf("%d",&x)!=EOF){
        dec_to_n(x,2);
        dec_to_n(x,8);
        dec_to_n(x,16);
        
        printf("\n输入一个十进制整数: ");
        
    }
    return 0;
}



void dec_to_n(int x,int n){
    char ans[N];
    char map[17] = {"0123456789ABCDEF"};
    int r;
    int cnt=0,i;
    do{
        r=x%n;
        ans[cnt++]=map[r];
        x=x/n;
    }
    while(x!=0);
    for(i=cnt-1;i>=0;--i)
    printf("%c",ans[i]);
    
    printf("\n");
}

任务四截图

任务五

#include<stdio.h>
#define N 5
void input(int x[], int n);

void output(int x[], int n);

double average(int x[], int n);
void bubble_sort(int x[], int n);

int main() {
 int scores[N];
 double ave;
 
 printf("录入%d个分数:\n", N);
 input(scores, N);
 
 printf("\n输出课程分数: \n");
 output(scores, N);
 
 printf("\n课程分数处理: 计算均分、排序...\n");
 ave = average(scores, N);
 bubble_sort(scores, N);
 
 printf("\n输出课程均分: %.2f\n", ave);
 printf("\n输出课程分数(高->低):\n");
 output(scores, N);
 
 return 0;
}

void input(int x[],int n){
    int i;
    
    for(i=0;i<n;i++)
    printf("%d",x[i]);
    printf("\n");
}

void output(int x[],int n){
    int i;
    for(i=0;i<n;i++)
    printf("%d",x[i]);
    printf("\n");
}

double average(int x[],int n)
{
    int i;
    double ave;
    for(i=0;i<n;i++)
    {
        ave+=x[i];
    }
    ave/=n;
    return ave;
}

void bubble_sort(int x[],int n){
    int i,j,t;
    for(i=0;i<n;i++){
    
     for(j=i;j<n;j++){
         if(x[j]<x[j+1])
         {
             t=x[j];
             x[j]=x[j+1];
             x[j+1]=t;
         }
     }
}
     
}

 

任务六

#include<stdio.h>
#include<string.h>

#define N 5
#define M 20

void output(char str[][M],int n);
void bubble_sort(char str[][M],int n);

int main(){
    char name[][M]={"Bob","Bill","Joseph","Taylor","George"};
    int i;
    
    printf("输出初始名单:\n");
    output(name,N);
    
    printf("\n排序中.....\n");
    bubble_sort(name,N);
    
    printf("\n按字典输出名单:\n");
    output(name,N);
    
    return 0;
}

void output(char str[][M],int n){
    int i;
    
    for(i=0;i<n;i++)
    printf("%s\n",str[i]);
}

void bubble_sort(char str[][M],int n){
    int i,j;
    char x[M];
    for(i=0;i<n;i++){
        for(j=i;j<n;j++){
            if(strcmp(str[j],str[j+1])>0)
            {
                strcpy(x,str[j]);
                strcpy(str[j],str[j+1]);
                strcpy(str[j+1],x);
            }
        }
    }
}

任务六截图

任务八

#include<stdio.h>
#define N 100
#define M 4
void output(int x[][N],int n);
void rotate_to_right(int x[][N],int n);

int main(){
    int t[][N]={{21,12,13,24},
                {25,16,47,38},
                {29,11,32,54},
                {42,21,33,10}};
        
        printf("yuanshijuzhen:\n");
        output(t,M);
        
        printf("bianhuanhoujuzhen:\n");
        output(t,M);
        
        return 0;        
}

void output(int x[][N],int n){
    int i,j;
    
    for(i=0;i<n;i++){
        for(j=0;j<n;j++)
        printf("%4d",x[i][j]);
        
        printf("\n");
    }
}

void rotate_to_right(int x[][N],int n){
    int i,j,a;
    
    for(i=0;i<M;i++)
    {
    a=x[i][M-1];
    }
    
    for(j=M-1;j>=1;j--){
    x[i][j]=x[i][j-1];}
    
    x[i][0]=a;
}

截图