ccc

课本第291页第4题

#include<stdio.h>

void main()

{

    int n, m, i, k;

    int p_begin;

    int arr[];

    scanf("%d", &n);

    for(i = ; i < n; i ++)

        scanf("%d", &arr[i]);

    scanf("%d", &m);

    p_begin = ;

    p_begin = p_begin - m < ?

    -(p_begin - m) % n : (p_begin - m) % n;

    for(i = p_begin, k = ; k < n; k++){

        if(i >= n) i = ;

        printf("%d ", arr[i++]);

    }

}

课本第291页第11题

#include<stdio.h>

void main()

{

    int i = ;

    int strcmp(char *, char *);

    void sort(char *p[], int n);

    char s[][];

    char *p[];

    // input strings

    for(i = ; i < ; i ++)

        scanf("%s", s[i]);

    for(i = ; i < ; i ++)

        p[i] = s[i];

    sort(p ,);

    // display outputs on console

    for(i = ; i < ; i ++)

        printf("%s\n", p[i]);

}

int strcmp(char *s, char *t)

{

    for( ; *s == *t; s++, t++)

        if(*s == '\0')

            return ;

    return *s - *t;

}

void sort(char *p[], int n)

{

    char *temp = "hello world!";

    for(int i = ; i < n ; i ++)

        for(int j = ; j < n - i - ; j ++)

            if(strcmp(p[j] , p[j+]) > ){

                temp = p[j];

                p[j] = p[j+];

                p[j+] = temp;

            }

    return;

}

课本习题

#include<stdio.h>

#include<ctype.h>

void main()

{

    int i, j;

    char c;

    char s[][];

    i = ;

    c = 'a';

    while(c != EOF){

        while(!isdigit(c = getchar()))

            ;

        j = ;

        s[i][j++] = (char)c;   // 为了判断是不是数字要多读一个。

        while(isdigit(c = getchar()))

            s[i][j++] = (char)c;

        s[i++][j] = '\0';

    }

    printf("%d digits\n", i);

    for(int k = ; k < i; k ++)

        printf("%s\n", s[k]);

}

课本第292页 18题

#include<stdio.h>

void main()

{

    char *p[] = {

        "January",

        "February",

        "March",

        "April",

        "May",

        "June",

        "July",

        "August",

        "September",

        "October",

        "November",

        "December"

    };

    int month;

    scanf("%d", &month);

    printf("%s\n", p[month-]);

}

习题六

int strcmp(char *s, char *t)

{

    for( ; *s == *t; s++, t++)

        if(*s == '\0')

            return ;

    return *s - *t;

}

习题四

#include<stdio.h>

void main()

{

    int n, m, i, k;

    int p_begin;

    int arr[];

    scanf("%d", &n);

    for(i = ; i < n; i ++)

        scanf("%d", &arr[i]);

    scanf("%d", &m);

    p_begin = ;

    p_begin = p_begin - m < ?

    -(p_begin - m) % n : (p_begin - m) % n;

    for(i = p_begin, k = ; k < n; k++){

        if(i >= n) i = ;

        printf("%d ", arr[i++]);

    }

}

D:\lab_>a

习题三

#include<stdio.h>

int main()

{

    int arr[];

    int m, n, i;

    int sum = ;

    for(i = ; i < ; i ++)

        scanf("%d", arr+i);

    scanf("%d %d", &m, &n);

    for(i = m; i <= n; i ++)

        sum += *(arr+i);

    printf("sum = %d", sum);

    return ;

}

D:\lab_>a

sum =

习题七

#include<stdio.h>

#define MAXSIZE 1000

void insert(char *, char *, char c);

int length(char *s);

char ori_str[MAXSIZE];

void main()

{

    char insert_str[MAXSIZE];

    char c;

    // inputs

    gets(ori_str);

    gets(insert_str);

    scanf("%c", &c);

    insert(ori_str, insert_str, c);

    // outputs

    printf("%s", ori_str);

}

void insert(char s[], char t[], char c)

{

    int k, i, j;

    int p_last = length(s) + ;

    int length_t = length(t);

    k = ;

    //printf("a");

    while(s[k] != '\0'){

        if(s[k] == c){

            for(i = p_last; i >= k+; i --)

                s[i+length_t] = s[i];

            //printf("b");

            j = ;

            for(i = k+; i <= k+length_t; i ++)

                s[i] = t[j ++];

        }

        k += length_t;

    }

}

int length(char *s)

{

    int n;

    for(n = ; *s != '\0'; s++, n++)

        ;

    return n;

}

D:\lab_>a

aaaaa

d

a

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