1
#include <stdio.h>
int main()
{
char ch;
int a, b, c;
a = 0;
b = 0;
c = 0;
printf("请输入内容[#退出]: ");
while ((ch = getchar()) != '#')
{
if (ch == ' ')
a++;
else if (ch == '\n')
b++;
else
c++;
}
printf("空格 = %d, 换行 = %d, 其他字符 = %d.\n", a, b, c);
system("pause");
return 0;
}
2
#include <stdio.h>
int main()
{
char ch;
int i;
i = 0;
printf("该程序用于打印出对应字符的 ASCII 码\n\n");
printf("请输入字符[#退出]: ");
while ((ch = getchar()) != '#')
{
if (ch != '\n')
{
if ((i % 8 == 0) && (i != 0))
{
printf("\n");
}
i++;
printf("%c:%d ", ch, ch);
}
}
system("pause");
return 0;
}
3
#include <stdio.h>
int main()
{
int n, i, j;
int x, y;
i = 0;
j = 0;
x = 0;
y = 0;
printf("请输入整数: ");
while (scanf_s("%d", &n) == 1)
{
if (n == 0)
break;
if (n % 2 == 0)
{
i++;
x += n;
}
else
{
j++;
y += n;
}
}
if (i > 0 && j > 0)
{
printf("偶数: %d 平均值: %d\n", i, x / i);
printf("奇数: %d 平均值: %d\n", j, y / j);
}
else if (i > 0)
printf("偶数: %d 平均值: %d\n", i, x / i);
else if (j > 0)
printf("奇数: %d 平均值: %d\n", j, y / j);
else
printf("错误: 你没有输入任何整数.\n");
system("pause");
return 0;
}
4
#include <stdio.h>
int main()
{
char ch;
int i, j;
i = 0;
j = 0;
printf("请输入内容: ");
while ((ch = getchar()) != '#')
{
if (ch == '.')
{
i++;
putchar('!');
}
else if (ch == '!')
{
j++;
printf("!!");
}
else
putchar(ch);
}
printf("\n句号替换: %d\n", i);
printf("感叹号替换: %d\n", j);
system("pause");
return 0;
}
5
#include <stdio.h>
int main()
{
char ch;
int i, j;
i = 0;
j = 0;
printf("请输入内容: ");
while ((ch = getchar()) != '#')
{
switch (ch)
{
case '.':
i++;
printf("!");
break;
case '!':
j++;
printf("!!");
break;
default:
putchar(ch);
break;
}
}
printf("\n句号替换次数: %d\n", i);
printf("感叹号替换次数: %d\n", j);
system("pause");
return 0;
}
6
#include <stdio.h>
int main()
{
char ch;
int i, j, x, y;
i = 0;
j = 0;
x = 0;
y = 0;
printf("请输入内容: ");
while ((ch = getchar()) != '#')
{
i++;
if (ch == 'e')
x = i;
if (ch == 'i')
{
y = i;
if ((y - x) == 1)
j++;
}
}
printf("字符数: %d, 'ei'出现次数: %d\n", i, j);
system("pause");
return 0;
}
7
#include <stdio.h> //标准输入输出函数库文件
#define MONEY 1000 //基本工资1000美元/小时
#define MONEY1 1000*40
#define TAX1 300*0.15 //税率前300美元15%
#define TAX2 150*0.2 //续150美元为20%
#define TAX3 0.25 //余下的为25%
int main()
{
double hour, money, tax;
printf("请输入你的工作时间[小时]: ");
scanf_s("%lf", &hour);
if (hour <= 40)
money = hour * MONEY;
else
money = MONEY1 + (hour - 40)*1.5*MONEY;
if (money <= 300)
tax = money * 0.15;
else if (money <= 450)
tax = TAX1 + (money - 300)*0.2;
else
tax = TAX1 + TAX2 + (money - 450)*TAX3;
printf("你工作时间 %.2f 小时, 工资总额: $%.2f, 税金: $%.2f, 净收入: $%.2f.\n", hour, money, tax, money - tax);
system("pause");
return 0;
}
8
#include <stdio.h> //标准输入输出函数库文件
#define MONEY1 8.75 //基本工资8.75美元/小时
#define MONEY2 9.33 //基本工资9.33美元/小时
#define MONEY3 10.00 //基本工资10.00美元/小时
#define MONEY4 11.20 //基本工资11.20美元/小时
#define HOUR 1.5 //超过40小时1.5倍
#define TAX1 300*0.15 //税率前300美元15%
#define TAX2 150*0.2 //续150美元为20%
#define TAX3 0.25 //余下的为25%
int main()
{
double hour, money, money_1, tax;
int i;
b:printf("输入对应基本工资的编号：\n");
printf("1) $8.75/hr \t2)$9.33/hr\n");
printf("3) $10.00/hr \t4)$11.20/hr\n");
printf("5) 退出\n");
while ((i=getchar()) != 0)
{
if (i == '\n')
continue;
else
{
switch (i)
{
case '1':
money_1 = MONEY1;
break;
case '2':
money_1 = MONEY2;
break;
case '3':
money_1 = MONEY3;
break;
case '4':
money_1 = MONEY4;
break;
case '5':
goto quit;
default:
printf("输入错误请重新输入: \n");
goto b;
}
break;
}
break;
}
printf("请输入你的工作时间[小时]: ");
scanf_s("%lf", &hour);
if (hour <= 40)
money = hour * money_1;
else
money = (money_1*40) + (hour - 40)*HOUR*money_1;
if (money <= 300)
tax = money * 0.15;
else if (money <= 450)
tax = TAX1 + (money - 300)*0.2;
else
tax = TAX1 + TAX2 + (money - 450)*TAX3;
printf("你工作时间 %.2lf 小时, 工资总额: $%.2lf, 税金: $%.2lf, 净收入: $%.2lf.\n", hour, money, tax, money - tax);
quit:printf("完成再见！\n");
system("pause");
return 0;
}
9
#include <stdio.h>
int main()
{
unsigned int i, j, x, y, z, n;
printf("请输入一个整数: ");
scanf_s("%u", &i);
printf("小于 %u 的质数: \n", i);
for (j = 2, n = 0; j <= i; j++)
{
for (x = 2, y = 0; x < j; x++)
{
if (j%x == 0)
y++;
}
if (n % 10 == 0 && n != 0)
putchar('\n');
if (y == 0)
{
n++;
z = j;
printf("%5u ", z);
}
}
printf("\n");
system("pause");
return 0;
}
10
#include <stdio.h>
#define MONEY1 17850 //单身税金界限
#define MONEY2 23900 //户主税金界限
#define MONEY3 29750 //已婚，共有界限
#define MONEY4 14875 //已婚，离异界限
#define TAX1 0.15
#define TAX2 0.28
int main()
{
double money, money_1, tax;
int i;
bk:printf("请选择您缴纳税金的种类: \n");
printf("1) 单身 \t2) 户主\n");
printf("3) 已婚共有 \t4) 已婚离异\n");
printf("5) 退出\n");
while ((i = getchar()) != 0)
{
if (i == '\n')
continue;
switch (i)
{
case '1':
money_1 = MONEY1;
break;
case '2':
money_1 = MONEY2;
break;
case '3':
money_1 = MONEY3;
break;
case '4':
money_1 = MONEY4;
break;
case '5':
goto done;
default:
printf("输入有误, 请重新输入\n");
goto bk;
}
break;
}
printf("请输入你的工资收入: ");
while (scanf_s("%lf", &money) == 1)
{
if (money <= money_1)
tax = money * TAX1;
else
tax = money_1 * TAX1 + (money - money_1)*TAX2;
printf("您的工资收入为 $%.2f 应缴纳税金为 $%.2f\n", money, tax);
printf("请继续输入你的工资收入[q退出]: ");
}
done:printf("完成\n");
system("pause");
return 0;
}
11
#include <stdio.h>
#define GOODS1 2.05 //洋蓟 2.05美元/磅
#define GOODS2 1.15 //甜菜 1.15美元/磅
#define GOODS3 1.09 //胡萝卜 1.09美元/磅
#define DIS 0.05 //100美元订单优惠5%
#define MONEY1 6.5 //小于或等于5磅的订单收6.5美元运费和包装费
#define MONEY2 14 //5~20磅的订单收取14美元运费和包装费
#define MONEY3 0.5 //超过20磅续重每磅加0.5美元
//验证重量输入是否正确函数
double a_pound(void);
char a_ch(void);
int main()
{
char ch;
double money, money_1, money_2, money_3;
double pound_1, pound_2, pound_3, pound_11, pound_22, pound_33, dis;
double pfc;
money_1 = 0;
money_2 = 0;
money_3 = 0;
pound_1 = 0;
pound_2 = 0;
pound_3 = 0;
bk:printf("请选择需要购买的商品\n");
printf("a) 洋蓟[$%.2f] \t\tb) 甜菜[$%.2f]\nc) 胡萝卜[$%.2f] \tq) 退出订购\n",GOODS1,GOODS2,GOODS3);
while ((ch = a_ch()) != 'q')
{
switch (ch)
{
case 'a':
printf("请输入你要购买洋蓟的重量[磅]: ");
pound_11 = a_pound();
pound_1 += pound_11;
money_1 = GOODS1 * pound_1;
goto bk;
case 'b':
printf("请输入你要购买甜菜的重量[磅]: ");
pound_22 = a_pound();
pound_2 += pound_22;
money_2 = GOODS2 * pound_2;
goto bk;
case 'c':
printf("请输入你要购买胡萝卜的重量[磅]: ");
pound_33 = a_pound();
pound_3 += pound_33;
money_3 = GOODS3 * pound_3;
goto bk;
default:
printf("输入有误请重新输入\n");
goto bk;
}
}
printf("您的购买信息为: \n");
if ((pound_1 + pound_2 + pound_3) > 0)
{
if ((pound_1 + pound_2 + pound_3) <= 5)
pfc = MONEY1;
else if ((pound_1 + pound_2 + pound_3) <= 20)
pfc = MONEY2;
else
pfc = MONEY2 + ((pound_1 + pound_2 + pound_3) - 20)*MONEY3;
}
else
pfc = 0;
if ((money_1 + money_2 + money_3) >= 100)
{
dis = (money_1 + money_2 + money_3 + pfc)*DIS;
money = (money_1 + money_2 + money_3 + pfc) - dis;
}
else
{
dis = 0;
money = money_1 + money_2 + money_3 + pfc;
}
if (pound_1 > 0)
printf("洋蓟售价: $%.2f \t订购的重量: %.2f[磅] \t订购的费用: $%.2f\n", GOODS1, pound_1, money_1);
if (pound_2 > 0)
printf("甜菜售价: $%.2f \t订购的重量: %.2f[磅] \t订购的费用: $%.2f\n", GOODS2, pound_2, money_2);
if (pound_3 > 0)
printf("胡萝卜售价: $%.2f \t订购的重量: %.2f[磅] \t订购的费用: $%.2f\n", GOODS3, pound_3, money_3);
printf("订单总费用: $%.2f \t运费和包装费: $%.2f \t折扣: -$%.2f\n应付费用总额: $%.2f\n",
money_1 + money_2 + money_3, pfc, dis, money);
printf("完成退出\n");
system("pause");
return 0;
}
char a_ch(void)
{
int ch;
ch = getchar();
while (getchar() != '\n')
continue;
return ch;
}
double a_pound(void)
{
double found_a, found_b;
input:if (scanf_s("%lf", &found_a) == 1)
{
while (getchar() != '\n')
continue;
found_b = found_a;
}
else
{
while (getchar() != '\n')
continue;
printf("输入有误, 请重新输入: ");
goto input;
}
return found_b;
}
