1
#include <stdio.h>
void critic(int *n);
int main()
{
int units;
printf("多少磅重的黄油?\n");
scanf_s("%d", &units);
while (units != 56)
critic(&units);
printf("你一定看过它!\n");
system("pause");
return 0;
}
void critic(int *n)
{
printf("没有运气, 我的朋友. 再试一次.\n");
scanf_s("%d", n);
}
2
/* pe12-2a.h */ #include <stdio.h> void set_mode(int n); void get_info(void); void show_info(void);
/*
pe12-2a.c
*/
#include "pe12-2a.h"
static int s_mode = 0;
static double distance = 0;
static double petrol = 0;
void set_mode(int n)
{
char s1_mode[2][5] = { "公制","US" };
switch (n)
{
case 0:
s_mode = 0;
break;
case 1:
s_mode = 1;
break;
default:
printf("指定的模式无效, 使用上次输入模式 %d(%s).\n", s_mode, s1_mode[s_mode]);
break;
}
}
void get_info(void)
{
if (s_mode == 0)
{
printf("输入行驶的距离[公里]: ");
scanf_s("%lf", &distance);
while (distance != 1 && distance <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入行驶的距离[公里]: ");
scanf_s("%lf", &distance);
}
printf("输入耗油量[升]: ");
scanf_s("%lf", &petrol);
while (petrol != 1 && petrol <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入耗油量[升]: ");
scanf_s("%lf", &petrol);
}
}
else
{
printf("输入行驶的距离[英里]: ");
scanf_s("%lf", &distance);
while (distance != 1 && distance <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入行驶的距离[英里]: ");
scanf_s("%lf", &distance);
}
printf("输入耗油量[加仑]: ");
scanf_s("%lf", &petrol);
while (petrol != 1 && petrol <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入耗油量[加仑]: ");
scanf_s("%lf", &petrol);
}
}
}
void show_info(void)
{
double total;
if (s_mode == 0)
{
total = petrol / distance * 100;
printf("燃油消耗量为每百公里 %.2f 升.\n", total);
}
else
{
total = distance / petrol;
printf("燃油消耗是每加仑 %.2f 英里.\n", total);
}
}
/*
pe12-2b.c
*/
#include <stdio.h>
#include "pe12-2a.h"
int main()
{
int mode;
printf("对于公制模式输入0, 对于US模式输入1: ");
scanf_s("%d", &mode);
while (mode >= 0)
{
set_mode(mode);
get_info();
show_info();
printf("对于公制模式输入0, 对于US模式输入1 [-1退出]: ");
scanf_s("%d", &mode);
}
printf("完成.\n");
system("pause");
return 0;
}
3
/* pe12-2a.h */ #include <stdio.h> void set_mode(int n, int *s_mode); void get_info(int s_mode, double *distance, double *petrol); void show_info(int s_mode, double distance, double petrol);
/*
pe12-2a.c
*/
#include "pe12-2a.h"
void set_mode(int n, int *s_mode)
{
char s1_mode[2][5] = { "公制","US" };
switch (n)
{
case 0:
*s_mode = 0;
break;
case 1:
*s_mode = 1;
break;
default:
printf("指定的模式无效, 使用上次输入模式 %d(%s).\n", *s_mode, s1_mode[*s_mode]);
break;
}
}
void get_info(int s_mode, double *distance, double *petrol)
{
if (s_mode == 0)
{
printf("输入行驶的距离[公里]: ");
scanf_s("%lf", distance);
while (*distance != 1 && *distance <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入行驶的距离[公里]: ");
scanf_s("%lf", distance);
}
printf("输入耗油量[升]: ");
scanf_s("%lf", petrol);
while (*petrol != 1 && *petrol <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入耗油量[升]: ");
scanf_s("%lf", petrol);
}
}
else
{
printf("输入行驶的距离[英里]: ");
scanf_s("%lf", distance);
while (*distance != 1 && *distance <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入行驶的距离[英里]: ");
scanf_s("%lf", distance);
}
printf("输入耗油量[加仑]: ");
scanf_s("%lf", petrol);
while (*petrol != 1 && *petrol <= 0)
{
while (getchar() != '\n')
continue;
printf("输入错误, 输入耗油量[加仑]: ");
scanf_s("%lf", petrol);
}
}
}
void show_info(int s_mode, double distance, double petrol)
{
double total;
if (s_mode == 0)
{
total = petrol / distance * 100;
printf("燃油消耗量为每百公里 %.2f 升.\n", total);
}
else
{
total = distance / petrol;
printf("燃油消耗是每加仑 %.2f 英里.\n", total);
}
}
/*
pe12-2b.c
*/
#include <stdio.h>
#include "pe12-2a.h"
int main()
{
int mode;
int s_mode = 0;
double distance = 0;
double petrol = 0;
printf("对于公制模式输入0, 对于US模式输入1: ");
scanf_s("%d", &mode);
while (mode >= 0)
{
set_mode(mode, &s_mode);
get_info(s_mode, &distance, &petrol);
show_info(s_mode, distance, petrol);
printf("对于公制模式输入0, 对于US模式输入1 [-1退出]: ");
scanf_s("%d", &mode);
}
printf("完成.\n");
system("pause");
return 0;
}
4
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
int roll(int n);
void show(int n);
int total1 = 0;
int total2 = 0;
int main()
{
int num;
srand((unsigned int)time(0)); //获取时间 随机种子
puts("请输入你要掷硬币的次数: ");
while (scanf_s("%d", &num) == 1)
{
if (num <= 0)
break;
show(num);
puts("请输入你要掷硬币的次数[0退出]: ");
}
printf("roll() 函数被调用了 %d 次.\n", total1);
printf("show() 函数被调用了 %d 次.\n", total2);
puts("完成");
system("pause");
return 0;
}
int roll(int n)
{
int tot;
tot = rand() % n;
total1++;
return tot;
}
void show(int n)
{
int i, m;
int j;
char coin[][9] = { "正面朝上","反面朝上" };
for (i = 1, j = 1; i <= n; i++)
{
m = roll(2);
printf("第 %d 次, 你把硬币掷出结果: %s\n", j, coin[m]);
j++;
}
total2++;
}
5
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#define SIZE 100
//生成随机数
int roll(int n);
//统计100次随机数
void count(int *str, int n);
//排序
void sorting(int *str, int n);
int main()
{
int tot[SIZE];
int *ptr;
ptr = tot;
srand((unsigned int)time(0)); //读取时间 随机种子
count(tot, SIZE);
sorting(ptr, SIZE);
system("pause");
return 0;
}
int roll(int n)
{
int num;
num = rand() % n + 1;
return num;
}
void count(int *str, int n)
{
int i;
for (i = 0; i < n; i++)
{
str[i] = roll(10);
}
puts("原始随机数: ");
for (i = 0; i < n; i++)
{
if (i % 10 == 0 && i != 0)
putchar('\n');
printf("%-2d ", str[i]);
}
putchar('\n');
}
void sorting(int *str, int n)
{
int i, j;
int ptr;
for (i = 0; i < n; i++)
{
for (j = 0; j < n; j++)
{
if (str[j] < str[j + 1])
{
ptr = str[j];
str[j] = str[j + 1];
str[j + 1] = ptr;
}
}
}
puts("排序随机数[倒序]: ");
for (i = 0; i < n; i++)
{
if (i % 10 == 0 && i != 0)
putchar('\n');
printf("%-2d ", str[i]);
}
putchar('\n');
}
6
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#define SIZE 1000
//生成随机数
int roll(int n);
//统计随机数
void count(int n);
int main()
{
int n;
//srand((unsigned int)time(0)); //读取时间 随机种子
printf("输入随机种子: ");
while (scanf_s("%d", &n) == 1)
{
if (n <= 0)
break;
srand(n);
count(SIZE);
printf("输入随机种子[0退出]: ");
}
puts("完成");
system("pause");
return 0;
}
int roll(int n)
{
int num;
num = rand() % n + 1;
return num;
}
void count(int n)
{
int i;
int tot[10] = { 0,0,0,0,0,0,0,0,0,0 };
int num;
for (i = 0; i < n; i++)
{
num = roll(10);
switch (num)
{
case 1:
tot[0] += 1;
break;
case 2:
tot[1] += 1;
break;
case 3:
tot[2] += 1;
break;
case 4:
tot[3] += 1;
break;
case 5:
tot[4] += 1;
break;
case 6:
tot[5] += 1;
break;
case 7:
tot[6] += 1;
break;
case 8:
tot[7] += 1;
break;
case 9:
tot[8] += 1;
break;
case 10:
tot[9] += 1;
break;
default:
break;
}
}
for (i = 0; i < 10; i++)
{
printf("%d 出现的次数: %d 次.\n", i + 1, tot[i]);
}
}
7
/* diceroll.h */ extern int roll_count; void roll_n_dice(int tot, int dice, int sides);
/*
diceroll.c
掷筛子模拟程序
*/
#include <stdio.h>
#include <stdlib.h>
#include "diceroll.h"
static int rollem(int sides);
static int rollem(int sides) //该函数属于该文件私有
{
int roll;
roll = rand() % sides + 1;
return roll;
}
void roll_n_dice(int tot, int dice, int sides)
{
int i, d;
int total;
extern int *ptr;
for (i = 0; i < tot; i++)
{
for (d = 0, total = 0; d < dice; d++)
total += rollem(sides);
ptr[i] = total;
}
printf("您掷了 %d 次 %d 个 %d 面筛子.\n", tot, dice, sides);
for (i = 0; i < tot; i++)
{
if (i % 15 == 0 && i != 0)
putchar('\n');
printf("%2d ", ptr[i]);
}
putchar('\n');
}
/*
manydice.c
//多次掷筛子的模拟程序
*/
#include <stdio.h>
#include <stdlib.h> //提供 srand()
#include <time.h> //提供 time()
#include "diceroll.h"
int *ptr;
int main()
{
int dice, tot; //dice 筛子个数
int sides; //筛子面数
srand((unsigned int)time(0)); //随机种子 配合 rand() 使用, 用来获取系统随机时间, 因为系统时间时刻在变化
printf("输入次数, 输入q退出: ");
while (scanf_s("%d", &tot) == 1)
{
if (tot <= 0)
{
printf("输入错误, 请输入大于0的整数, 输入次数, 输入q退出: ");
continue;
}
ptr = (int *)malloc(tot * sizeof(int));
if (ptr == NULL)
{
puts("内存分配失败, 结束.");
//exit(EXIT_FAILURE);
break;
}
printf("多少面和多少骰子: ");
bk:while (scanf_s("%d%d", &sides, &dice) != 2)
{
printf("输入错误, 请输入大于0的整数, 多少面和多少骰子: ");
}
if (sides <= 0 || dice <= 0)
{
printf("输入错误, 请输入大于0的整数, 多少面和多少骰子: ");
goto bk;
}
roll_n_dice(tot, dice, sides);
free(ptr);
printf("输入次数, 输入q退出: ");
}
puts("祝你好运!");
system("pause");
return 0;
}
8
// pe12-8.c
#include <stdio.h>
#include <stdlib.h>
int *make_array(int elem, int val);
void show_array(const int ar[], int n);
int main()
{
int *pa;
int size;
int value;
printf("输入元素的数量: ");
while (scanf_s("%d", &size) == 1 && size > 0)
{
printf("输入初始值: ");
scanf_s("%d", &value);
pa = make_array(size, value);
if (pa)
{
show_array(pa, size);
free(pa);
}
printf("输入元素的数量[<1 退出]: ");
}
puts("完成.");
system("pause");
return 0;
}
int *make_array(int elem, int val)
{
int *ptr;
int i;
ptr = (int *)malloc(elem * sizeof(int));
for (i = 0; i < elem; i++)
{
ptr[i] = val;
}
return ptr;
}
void show_array(const int ar[], int n)
{
int i;
for (i = 0; i < n; i++)
{
if (i % 8 == 0 && i != 0)
putchar('\n');
printf("%d ", ar[i]);
}
putchar('\n');
}
9
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>
int main()
{
int size;
char **ptr1;
int i;
printf("请输入你要输入的单词数量: ");
bk:while (scanf_s("%d", &size) != 1)
{
printf("输入错误, 请输入大于0的整数: ");
}
if (size <= 0)
{
printf("输入错误, 请输入大于0的整数: ");
goto bk;
}
ptr1 = (char **)malloc(size * sizeof(char *)); //每个元素都指向char指针 这里malloc函数返回一个指向指针的指针
printf("请输入 %d 个单词: \n", size);
i = 0;
while (i < size)
{
char ch;
bool judge = false;
while ((ch = getchar()) != EOF) //不能用'\n'因为用了最后的'\n'会被拦截, 下面无法判断结束
{
static j = 0;
char word[50];
if (isalpha(ch))
{
word[j] = ch;
j++;
judge = true;
}
else if (judge)
{
word[j] = '\0';
j = 0;
judge = false;
ptr1[i] = (char *)malloc(strlen(word) + 1); //字符指针指向对象大小
strcpy_s(ptr1[i], strlen(word) + 1, word);
i++;
if (i >= size) //判断单词数量从而跳出循环
break;
}
}
}
puts("你输入的单词: ");
for (i = 0; i < size; i++)
{
printf("%s\n", ptr1[i]);
}
free(ptr1);
system("pause");
return 0;
}
