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c primer plus（第六版） 第十五章答案（vscode编译运行通过）

2021-09-03 15:04:26  阅读：144  来源： 互联网

标签：case break vscode 第六版 int num plus printf include


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1.

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
int strToNum(char *str)
{
    int num = 0;
    while(*str)
    {
        num *= 2;
        num += *str - '0';
        str++;
    }

    return num;
}
int main(void)
{
    char * pbin = "01001001";

    printf("The %s's result is %d\n", pbin, strToNum(pbin));

    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#define SIZE 33

void showBstr(const char *str)
{
    int i = 0;
    while(str[i])
    {
        putchar(str[i]);
        if((++i % 4 == 0) && str[i])
            putchar(' ');
    }
}

void prinBinUseStr(int num)
{
    char temp[SIZE];

    for(int i = SIZE - 2; i >= 0; i--, num >>= 1)
    {
        temp[i] = (01 & num) + '0';
    }
    temp[SIZE - 1] = '\0';
    showBstr(temp);
}

void strToNum(char *str1, char *str2)
{
    int num1 = 0;
    int num2 = 0;
    int temp;

    while(*str1)
    {
        num1 *= 2;
        num1 += *str1 - '0';
        str1++;
    }
     while(*str2)
    {
        num2 *= 2;
        num2 += *str2 - '0';
        str2++;
    }
    printf("The ~%s is: ", str1);
    prinBinUseStr(~num1);
    putchar('\n');
    printf("The ~%s is: ", str2);
    prinBinUseStr(~num2);
    putchar('\n');
    printf("The %s & %s is: ", str1, str2);
    prinBinUseStr(num1 & num2);
    putchar('\n');
    printf("The %s | %s is: ", str1, str2);
    prinBinUseStr(num1 | num2);
    putchar('\n');
    printf("The %s ^ %s is: ", str1, str2);
    prinBinUseStr(num1 ^ num2);
    putchar('\n');
}

int main(int argc, char *argv[])
{
    char num1[SIZE];
    char num2[SIZE];
    if(argc < 3)
    {
        puts("The parameter number is too small. Check the parameter number");
        exit(EXIT_FAILURE);
    }
    else
    {
        strcpy(num1, argv[1]);
        strcpy(num2, argv[2]);
    }
    strToNum(num1, num2);

    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#define SIZE 33
void showOpenBit(int num)
{
    int count = 0;
    int temp = num;

    for(int i = 31; i >= 0; i--, temp >>= 1)
    {
        if(temp & 01 == 1)
        {
            count++;
        }
    }
    printf("There are %d open bits in %d\n", count, num);
}

void numTostr(int num, char *str)
{
    for(int i = 31; i >= 0; i--, num >>= 1)
    {
        str[i] = (num & 01) + '0';
    }
    str[32] = '\0';
}

int main(int argc, char *argv[])
{
    int num;
    char num1[SIZE];

    printf("Please input a num:(and input q to quit)");
    while(scanf("%d", &num) == 1)
    {
        numTostr(num, num1);
        printf("%s\n", num1);
        showOpenBit(num);
        printf("Please input a num:(and input q to quit)");
    }

    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#define SIZE 33

void numTostr(int num, char *str)
{
    for(int i = 31; i >= 0; i--, num >>= 1)
    {
        str[i] = (num & 01) + '0';
    }
    str[32] = '\0';
}

int TheNumPos(int num, int pos)
{
    int mask = 1 << pos;
    if((num & mask) == mask)
        return 1;
    else
        return 0;
}

int main(int argc, char *argv[])
{
    int num1, pos;
    char num2[SIZE];

    printf("Please input two num:(and input q to quit)");
    while(scanf("%d %d", &num1, &pos) == 2)
    {
        numTostr(num1, num2);
        printf("%s\n", num2);
        if(TheNumPos(num1, pos) == 1)
        {
            printf("In the %d, at %d pos is 1\n", num1, pos);
        }
        else
        {
            printf("In the %d, at %d pos is 0\n", num1, pos);
        }
        printf("Please input two num:(and input q to quit)");
    }

    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#define SIZE 33

void numTostr(int num, char *str)
{
    for(int i = 31; i >= 0; i--, num >>= 1)
    {
        str[i] = (num & 01) + '0';
    }
    str[32] = '\0';
}

unsigned int rotate_1(unsigned int x, int pos)
{
    size_t size = CHAR_BIT * sizeof(unsigned int);
    unsigned int num;

    pos = pos % size;
    num = x >> (size - pos);
    num |= x << pos;
    return num;
}

int main(int argc, char *argv[])
{
    int  pos;
    unsigned int num1, num2;
    char temp1[SIZE], temp2[SIZE];

    printf("Please input two num:(and input q to quit)");
    while(scanf("%u %d", &num1, &pos) == 2)
    {
        num2 = rotate_1(num1, pos);
        numTostr(num1, temp1);
        numTostr(num2, temp2);
        printf("The %s rotate %d is %s\n", temp1, pos, temp2);
        printf("Please input two num:(and input q to quit)");
    }

    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#define SIZE 33

typedef struct fontFormat{
    unsigned int id: 8;
    unsigned int size: 7;
    unsigned int allgnment: 2;
    bool overstriking: 1;
    bool italic: 1;
    bool underline: 1;
}seeting;

#define left 0
#define center 1
#define right 2

#define on true
#define off false

void showInfor(seeting front)
{
    printf("%3s %4s %9s   %3s   %3s   %3s\n","ID", "SIZE", "ALIGNMENT", "B", "I", "U");
    printf("%3d %4d ",front.id,front.size); 
    switch(front.allgnment)
    {
        case left: printf("   %-9s", "left");break;
        case center: printf("   %-9s", "center");break;
        case right: printf("   %-9s", "right");break;
    }
    switch(front.overstriking)
    {
        case on: printf(" %3s","on");break;
        case off: printf(" %3s","off");break;
    }
    switch(front.italic)
    {
        case on: printf("   %3s","on");break;
        case off: printf("   %3s","off");break;
    }
    switch(front.underline)
    {
        case on: printf("   %3s","on");break;
        case off: printf("   %3s","off");break;
    }
    
}

void eatLine(void)
{
    while(getchar() != '\n')
        continue;
}

int getChoice(char *arr)
{
    int ch;

    ch = getchar();
    eatLine();
    while(strchr(arr,ch) == NULL)
    {
        printf("Please input %s\n", arr);
        ch = getchar();
        eatLine();
    }

    return ch;
}

int menu(void)
{
    int ch;
    printf("\n");
    printf("f)change font     s)change size      a)change alignment\n");
    printf("b)toggle bold     i)toggle italic    u)toggle underline\n");
    printf("q)quit\n");
    ch = getChoice("fsabiuq");

    return ch;
}

void changeAlignment(seeting *pt)
{
    int ch;

    printf("Select alignment:\n");
    printf("l)left  c)center    r)right\n");
    ch = getChoice("lcr");
    switch(ch)
    {
        case 'l':pt->allgnment = left; break;
        case 'c':pt->allgnment = center; break;
        case 'r':pt->allgnment = right; break;
    }
}

void showMenu(seeting *pt)
{
    int ch;

    unsigned int temp;

    showInfor(*pt);
    putchar('\n');
    putchar('\n');
    
    while((ch = menu()) != 'q')
    {
        switch(ch)
        {
            case 'f':printf("Enter font ID(0-255):"); scanf("%u",&temp);eatLine();temp &= 0xff;pt->id = temp; break;
            case 's':printf("Enter font size(0-127):"); scanf("%u", &temp);eatLine();temp &= 0x7f;pt->size = temp; break;
            case 'a':changeAlignment(pt); break;
            case 'b': pt->overstriking = !pt->overstriking; break;
            case 'i': pt->italic = !pt->italic; break;
            case 'u': pt->underline = !pt->underline; break;
        }
        showInfor(*pt);
        putchar('\n');
        putchar('\n');
    }
}

int main(int argc, char *argv[])
{
    seeting front = {1, 12, left, off, off, off};
    showMenu(&front);
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#include <limits.h>

#define LEFT 0x00000
#define CENTER 0x08000
#define RIGHT 0x10000
#define SIZE_SHIFT 8
#define ID_MASK 0xff
#define SIZE_MASK 0x7f00
#define AllIGN_MASK 0x18000
#define OVERSTRIKING_ON 0x20000
#define ITALIC_ON 0x40000
#define UNDERLINE_ON 0x80000
#define OFF 0x00000

typedef struct{
    unsigned int id:8;
    unsigned int size:7;        
    unsigned int allign:2;
    bool overstriking:1;
    bool italic:1;
    bool underline:1;
}setting;

void show_result(unsigned long);
int show_menu(void);
void change_font(unsigned long *);
void change_size(unsigned long *);
void change_alignment(unsigned long *);
void toggle_bold(unsigned long *);
void toggle_italic(unsigned long *);
void toggle_underline(unsigned long *);

int main(int argc,char *argv[])
{
  int ch;
  
  unsigned long font = 1 | (12) << SIZE_SHIFT | LEFT; 
  show_result(font);
  while((ch = show_menu()) != 'q')
  {
      switch(ch)
      {
          case 'f':change_font(&font);break;
          case 's':change_size(&font);break;
          case 'a':change_alignment(&font);break;
          case 'b':toggle_bold(&font);break;
          case 'i':toggle_italic(&font);break;
          case 'u':toggle_underline(&font);break;
      }
      putchar('\n');
      show_result(font);
  }
  printf("end");
  printf("\n");
  system("pause");
  
    return 0;
}

void show_result(unsigned long font)
{
    printf("ID SIZE ALIGNMENT    B    I    U\n");
    printf("%2d %4d",font & ID_MASK, ((font & SIZE_MASK) >> 8));
    switch(font & AllIGN_MASK)
    {
        case LEFT:printf("   left");break;
        case CENTER:printf("  center");break;
        case RIGHT:printf("  right");break;
        default:break; 
    }
    switch(font & OVERSTRIKING_ON)
    {
        case OVERSTRIKING_ON:printf("       on");break;
        case OFF:printf("      off");break;
        default:break; 
    }
    switch(font & ITALIC_ON)
    {
        case ITALIC_ON:printf("   on");break;
        case OFF:printf("  off");break;
        default:break; 
    }
    switch(font & UNDERLINE_ON)
    {
        case UNDERLINE_ON:printf("   on\n");break;
        case OFF:printf("  off\n");break;
        default:break; 
    }

}

void eatline(void)
{
    while(getchar() != '\n')
        continue;
}

int get_choose(const char *p)
{
    int ch;

    ch = getchar();
    if(strchr(p,ch) == NULL)
    {
        printf("Please input right option(%s)\n",p);
        eatline();
        ch = getchar();
    }
    eatline();
    return ch;
}

#define SIZE 7
int show_menu(void)
{
    const char *p[SIZE] = {
        "change foot","change size","change alignment","toggle bold","toggle italic","toggle underline","quit",
    };
    const char data[SIZE + 1] = "fsabiuq";
    for(int i = 0; i < SIZE; i++)
    {
        i % 3 == 0?printf("\n"):printf("    ");
        printf("%c)%-17s",data[i],p[i]);
    }
    putchar('\n');

    return get_choose(data);
}

void change_font(unsigned long *p)
{
    int font_id;

    printf("Enter font ID:(0~255):");
    while(scanf("%d",&font_id) != 1)
    {
        printf("Please input a number(0-255):");
        scanf("%*s");
    }
    eatline();
    font_id &= 0xff;
    *p &= 0xfff00;
    *p |= font_id;
}

void change_size(unsigned long *p)
{
    int font_size;

    printf("Enter font size:(0~127):");
    while(scanf("%d",&font_size) != 1)
    {
        printf("Please input a number(0-127):");
        scanf("%*s");
    }
    eatline();
    font_size &= 0x7f;
    *p &= 0xf80ff;
    *p |= font_size << SIZE_SHIFT;
}
#define SIZE2 3
int show_alignment_menu(void)
{
    const char *data1[SIZE2] = {"left","center","right"};
    const char data2[SIZE2 + 1] = "lcr";
    for(int i = 0; i < SIZE2; i++)
    {
        printf("%c)%-8s",data2[i],data1[i]);
    }
    putchar('\n');
    return get_choose(data2);
}

void change_alignment(unsigned long *p)
{
    int ch;

    ch = show_alignment_menu();
    switch(ch)
    {
        case 'l':*p &= 0xE7fff;*p |= LEFT;break;
        case 'c':*p &= 0xE7fff;*p |= CENTER;break;
        case 'r':*p &= 0xE7fff;*p |= RIGHT;break;
        default:break;
    }
}

void toggle_bold(unsigned long *p)
{
  *p ^= OVERSTRIKING_ON;
}

void toggle_italic(unsigned long *p)
{
   *p ^= ITALIC_ON;
}

void toggle_underline(unsigned long *p)
{
   *p ^= UNDERLINE_ON;
}

标签：case,break,vscode,第六版,int,num,plus,printf,include
来源： https://blog.csdn.net/qq_41701950/article/details/120081866

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