//7.1
#include<stdio.h>
int main(void)
{int countspace=0,countendl=0,countothers=0;
char ch;
ch=getchar();
while(ch!='#')
{
if(ch==' ')
countspace++;
else if(ch=='\n')
countendl++;
else countothers++;
ch=getchar();
}
printf("The numbers of space,endl and others are %d,%d and %d. ",countspace,countendl,countothers);
return 0;
}
//7.2
#include<stdio.h>
int main(void)
{int n=0;
char ch;
ch=getchar();
printf("The ASCII of char is ASCII\n");
while(ch!='#')
{
printf("%c-%d\t",ch,ch);
n++;
if(n==8)
{
printf("\n");
n=0;
}
ch=getchar();
}
return 0;
}
//7.3
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
int sum1=0,sum2=0,count1=0,count2=0;
int a;
float av1,av2;
printf("please enter !\n");
while(scanf("%d",&a)==1&&a!=0)
{
if(a%2==0)
{
count1++;
sum1+=a;
}
else
{
count2++;
sum2+=a;
}
}
av1=sum1/count1;
av2=sum2/count2;
printf("ou數的個數和平均數爲%d,%.2lf",count1,av1);
printf("ji數的個數和平均數爲%d,%.2lf",count2,av2);
return 0;
}
//7.4
#include<stdio.h>
#include<stdlib.h>
int main(void)
{
char ch;
int n = 0;
while ((ch = getchar()) != '#')
{
if (ch == '.')
{
ch = '!';
putchar(ch);
n++;
}
else if (ch == '!')
{
putchar('!');
putchar('!');
n++;
}
else
putchar(ch);
}
printf("\n");
printf("%d\n",n);
return 0;
}
//7.5
#include<stdio.h>
int main(void)
{
char ch;
int n = 0;
while ((ch = getchar()) != '#')
{
switch (ch)
{
case '.':
putchar('!');
n++;
break;
case '!':
putchar('!');putchar('!');
n++;
break;
default :
putchar(ch);
break;
}
}
printf("\n%d\n",n);
return 0;
}
//7.6
#include <stdio.h>
int main(void)
{
char ch;
int n = 0;//n爲出現的次數
ch = getchar();
while(ch != '#')
{
if (ch == 'e')
{
ch = getchar();
if (ch == 'i')
{
n++;
}
}
else
ch = getchar();
}
printf("ei出現的次數爲%d\n", n);
}
/* 第七題 */
#include<stdio.h>
#define BASIC 10.00
#define OVER 1.5
#define FIRST_RATE 0.15
#define NEXT_RATE 0.20
#define LAST_RATE 0.25
#define FIRST_SUM 300 * 0.85
#define NEXT_SUM 150*0.8
int main(void)
{
int times;
while (scanf("%d",×) == 1)
{
if (times < 300/10)
printf("%lf",(double)10*times*(1 - 0.15));
else if (times < 400/10)
printf("%lf",FIRST_SUM + (double)(times*10 - 300)*0.8);
else
printf("%lf",FIRST_SUM + NEXT_SUM + (double)(times - 40) * 1.5 * 10 * 0.75);
}
return 0;
}
/* 第八題 */
#include<stdio.h>
#define NON_OVERTIME 40.00
#define BASIC 10.00
#define FIRST_HOUR 300.00
#define NEXT_HOUR 450.00
#define FIRST_RATE 0.15
#define NEXT_RATE 0.20
#define LAST_RATE 0.25
void interface(void);
char star(void);
int main(void)
{
int num, x = 1;
float hour,sum,tax,gain,perhour;
printf("Please enter you work hour a week.\n");
scanf("%f",&hour);
if (hour > NON_OVERTIME)
hour = NON_OVERTIME + (hour - NON_OVERTIME) * 1.5;
star();
interface();
star();
printf("Which is your wages per hour.\n");
scanf("%d",&num);
while (x)
{
switch (num)
{
case 1:
perhour = 8.75;
x = 0;
break;
case 2:
perhour = 9.33;
x = 0;
break;
case 3:
perhour = 10.00;
x = 0;
break;
case 4:
perhour = 11.20;
x = 0;
break;
case 5:
return 0;
break;
default:
printf("please input number from 1 to 5: \n");
scanf("%d",&num);
}
}
sum = perhour * hour;
if (sum <= FIRST_HOUR)
{
tax = sum * 0.15;
gain = sum - tax;
}
else if (sum > FIRST_HOUR && sum <= NEXT_HOUR)
{
tax = FIRST_HOUR * 0.15 + (sum - FIRST_HOUR) * 0.20;
gain = sum - tax;
}
else
{
tax = FIRST_HOUR * 0.15 + 150 * 0.2 + (hour - 450) * 0.25;
gain = sum - tax;
}
printf("real hour:%.f perhour:%.2f tax:%.2f gain:%.2f", hour, perhour, tax, gain);
return 0;
}
void interface(void)
{
printf("Enter the number corresponding to the desired pay rate or action:\n");
printf("1) $8.75/hr 2) $9.33/hr\n");
printf("3) $10.00/hr 4) $11.20/hr\n");
printf("5) quit\n");
}
char star(void)
{
int i = 1;
for (i;i < 100;i++)
printf("*");
printf("\n");
}
/* 第九題 */
#include<stdio.h>
int main(void)
{
int integer;
int i, j;
int sign = 0;
printf("Please enter a postive integer: ");
while (scanf("%d",&integer) != 0 && integer > 0)
{
for (i = 2;i <= integer;i++)
{
for (j = 2;j <= i;j++)
{
if (i % j == 0 && i != j)
{
sign = 1;
break;
}
}
if (sign == 0)
printf("%d ",i);
sign = 0;
}
printf("\n");
printf("Please enter a postive integer: ");
}
return 0;
}
//7.10
/* 第十題 */
#include<stdio.h>
#define OR_RATE 0.15
#define OV_RATE 0.28
void star(void);
void interface(void);
int main(void)
{
int choice;
double money, Boundaries, tax;
star();
interface();
star();
while (scanf("%d",&choice) == 1 )
{
int x = 1;
while (x)
{
switch(choice)
{
case 1:
x = 0;
Boundaries = 17850;
break;
case 2:
x = 0;
Boundaries = 23900;
break;
case 3:
x = 0;
Boundaries = 29750;
break;
case 4:
x = 0;
Boundaries = 14875;
break;
case 5:
return 0;
default:
printf("please input number from 1 to 5: \n");
scanf("%d",&choice);
}
}
printf("Enter your salary: \n");
scanf("%lf",&money);
if (money <= Boundaries)
tax = money * 0.15;
else
tax = Boundaries * 0.15 + (money - Boundaries) * 0.28;
printf("Tax: %.2lf\n",tax);
printf("Enter 1 to 4 to continue or 5 to quit.\n");
}
return 0;
}
void star(void)
{
int i;
for (i = 0;i <= 100;i++)
printf("*");
printf("\n");
}
void interface(void)
{
printf("Enter your category: \n");
printf("1) Single 2) Household\n");
printf("3) Married 4) Divorced\n");
printf("5) Quit\n");
}
/* 第十一題 */
#include<stdio.h>
#define Artichokes 2.05 //洋薊
#define Sugarbeet 1.15 //甜菜
#define Carrots 1.09 //胡蘿蔔
void interface(void);
int main(void)
{
char ch;
int an, bn, cn, sn, n;
float sum, count, other_count, cost, cost_vegtables;
interface();
while ((ch = getchar()) != 'q')
{
switch (ch)
{
case 'a':
printf("How many pounds of artias do you want?\n");
scanf("%f",&n);
an += n;
sn += n;
sum += Artichokes * n;
break;
case 'b':
printf("How many pounds of sugarbeet do you want?\n");
scanf("%f",&n);
bn += n;
sn += n;
sum += Sugarbeet * n;
break;
case 'c':
printf("How many pounds of carrots do you want?\n");
scanf("%f",&n);
cn += n;
sn += n;
sum += Carrots * n;
break;
default:
printf("Please input a or b or c (q to quit): \n");
}
printf("What else do you need?\n");
getchar();
}
if (sum > 100)
count = 0.05 * sum;
else
count = 0.0;
if (sn <= 5)
other_count = 6.5;
else if (sn <= 20)
other_count = 14;
else
other_count = 14 + (sn - 20) * 0.5;
cost_vegtables = sum - count;
cost = sum - count - other_count;
printf("Artichokes: %.2f Sugarbeet: %.2f Carrots: %.2f\n",Artichokes,Sugarbeet,Carrots);
printf("Weight: %.2f pounds cost_vegtables: %.2f Sum: %.2f \n",sn,cost_vegtables,sum);
printf("discount: %.2f pounds Freight and packaging charges: %f\n",count,other_count);
return 0;
}
void interface(void)
{
printf("*************************************\n");
printf("Choose which vegtable you need: \n");
printf("a) Artichokes b) Sugarbeet\n");
printf("c) Carrots q) Quit\n");
printf("*************************************\n");
}
