c语言算正方形面积和周长,C语言编8个程序比如输入正方形边长求其面积和周长正方体求体积...

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2018-08-07 回答

// 第一个：求数字位数

#include

#define CRT_SECURE_NO_DEPERCATE

int main(void)

{

int data;

printf("Enter a number:");

scanf("%d",&data);

if (data>=10000)

{printf("Input Error\n");system("pause");exit;}

else if (data>=1000)

printf("The number %4d has 4 numbers.\n");

else if (data>=100)

printf("The number %4d has 3 numbers.\n");

else if (data>=10)

printf("The number %4d has 2 numbers.\n");

else if (data>=1)

printf("The number %4d has 1 numbers.\n");

else {printf("Input Error\n");system("pause");exit;}

system("pause");

return 0;

}

// 第二个24小时制->AM/PM

#include

#define CRT_SECURE_NO_DEPERCATE

int main(void)

{

int hour,minute;

printf("Enter a 24-hour time:");

scanf("%d:%d",&hour,&minute);

switch (hour)

{

case 0:case 1:case 2:case 3:case 4:case 5:case 6:case 7:case 8:case 9:case 10:case 11:case 12:

printf("Equivalent 12-hour time: %-2.2d:%-2.2d AM\n",hour,minute);break;

case 13:case 14:case 15:case 16:case 17:case 18:case 19:case 20:case 21:case 22:case 23:

printf("Equivalent 12-hour time: %-2.2d:%-2.2d PM\n",hour-12,minute);break;

case 24:

printf("Equivalent 12-hour time: 00:%-2.2d AM\n",minute);break;

default:

printf("Input Error\n");system("pause");exit;

}

system("pause");

return 0;

}

// 第三个比较日期前后

#define CRT_SECURE_NO_DEPERCATE

#include

int main(void)

{

int year1,year2,month1,month2,day1,day2,p;

printf("Enter first date (mm/dd/yy):");

scanf("%d/%d/%d",&month1,&day1,&year1);

printf("Enter second date (mm/dd/yy):");

scanf("%d/%d/%d",&month2,&day2,&year2);

if (year1<>year2) p=year1>year2?1:2;

else if (month1<>month2) p=month1>month2?1:2;

else if (day1<>day2) p=day1>day2?1:2;

else p=0;

switch (p)

{

case 1:printf("%2d/%-2.2d/%4d is earlier than %2d/%-2.2d/%4d\n",month2,day2,year2,month1,day1,year1);break;

case 2:printf("%2d/%-2.2d/%4d is earlier than %2d/%-2.2d/%4d\n",month1,day1,year1,month2,day2,year2);break;

case 0:printf("They are definetely equal.\n");break;

}

system("pause");

return 0;

}

// 第四个给分数评级

#define _CRT_SECURE_NO_DEPERCATE /*Before all the includes*/

#include

int main(void)

{

int grade;

_Bool checkpoint;

checkpoint=true;

//Input

while (checkpoint)

{

printf("Enter numerical grade:");

scanf("%d",&grade);

if (grade<0||grade>100) {printf("Input Error,please try again\n");system("pause");}

else if checkpoint=false;

}

//Output

printf("Letter grade: ");

switch (grade/10)

{

case 10: case 9:printf("A");break;

case 8: printf("B");break;

case 7: printf("C");break;

case 6: printf("D");break;

default: printf("F");//Don't wanna a break.....

}

printf("\n");

//Pause

system("pause");

return 0;

}

// 第五个用英文显示数字

#define _CRT_SECURE_NO_DERECATE

#include

int main(void)

{

int input_number,first_digit,second_digit;

bool checkpoint;

//input

checkpoint=true;

while (checkpoint)

{

printf("Enter a two-digit number: ");

scanf("%d",&input_number);

if (input_number<0||input_number>99) {printf("Input Error,please try again.\n");system("pause");}

else checkpoint=false;

}

//output

printf("Your entered the number ");

if (input_number<=19)

switch (input_number) //0-19

{

case 0:printf("zero"); break;

case 1:printf("one"); break;

case 2:printf("two"); break;

case 3:printf("three"); break;

case 4:printf("four"); break;

case 5:printf("five"); break;

case 6:printf("six"); break;

case 7:printf("seven"); break;

case 8:printf("eight"); break;

case 9:printf("nine"); break;

case 10:printf("ten"); break;

case 11:printf("eleven"); break;

case 12:printf("twelve"); break;

case 13:printf("thirteen"); break;

case 14:printf("forteen"); break;

case 15:printf("fifteen"); break;

case 16:printf("sixteen"); break;

case 17:printf("seventeen");break;

case 18:printf("eighteen"); break;

case 19:printf("ninteen"); break;

}

else

{

first_digit=input_number/10;second_digit=input_number%10;

switch (first_digit)

{

case 2:printf("twenty"); break;

case 3:printf("thirty"); break;

case 4:printf("forty"); break;

case 5:printf("fifty"); break;

case 6:printf("sixty"); break;

case 7:printf("seventy");break;

case 8:printf("eighty"); break;

case 9:printf("ninty"); break;

}

switch (second_digit)

{

case 0: ; break;

case 1:printf("-one"); break;

case 2:printf("-two"); break;

case 3:printf("-three"); break;

case 4:printf("-four"); break;

case 5:printf("-five"); break;

case 6:printf("-six"); break;

case 7:printf("-seven"); break;

case 8:printf("-eight"); break;

case 9:printf("-nine"); break;

}

printf("\n");

//pause

system("pause");

return 0;

}

// 第六个统计最大数字

#define _CRT_SECURE_NO_DEPRECATE /*Before all the includes*/

#include /*scanf printf*/

#include /*system*/

#include /*bool true false*/

int main(void)

{

float input_data, largest = 0.0f;

printf("This program is used to caculate the largest number you entered.\n");

{

printf("Enter a number:");

scanf("%f", &input_data);

if (input_data>largest)

largest = input_data;

} while (input_data>0);

if (largest == 0) printf("Input Error!");

else printf("The largest number entered was %-5.2f\n", largest);

system("pause");

return 0;

}

// 第七个计算最大公约数

#define _CRT_SECURE_NO_DEPRECATE /*Before all the includes*/

#include /*scanf printf*/

#include /*system*/

#include /*bool true false*/

int main(void)

{

int a=0,b=0,t;

bool checkpoint=false;

{

printf("Enter two digits:");

scanf("%d%d ",&a,&b);

if (a>=1&&b>=1) checkpoint=true; else printf("Input error, please try again with mind.\n");

}

while (!checkpoint);

if (a

while (b!=0)

{

t=a%b;

a=b;

b=t;

}

printf("GCD(Greatest common divisor) is %d\n",a);

system("pause");

return 0;

}

// 第八最简化分数

#define _CRT_SECURE_NO_DEPRECATE /*Before all the includes*/

#include /*scanf printf*/

#include /*system abs*/

#include /*bool true false*/

int main(void)

{

int a=0,b=0,t,point=0,former_a,former_b;

bool checkpoint=false;

{

printf("Enter a fraction:");

scanf("%d/%d",&a,&b);

if (b!=0) checkpoint=true; else printf("Input error, please try again with mind.\n");

}

while (!checkpoint);

if (a==0) point=1;

else switch ((a<0)+(b<0))

{

case 1:point=2; /*NO break*/

default:a=abs(a);b=abs(b);

}

printf("In lowest terms: ");

switch (point)

{

case 1:/*a==0*/

printf("0\n");break;

case 2:/*negative*/

printf("-");

case 0:

former_a=a;

former_b=b;

if (a

while (b!=0)

{

t=a%b;

a=b;

b=t;

}

former_a=former_a/a;

former_b=former_b/a;

printf("%d",former_a);

if (former_b!=1) printf("/%d",former_b);

printf("\n");

break;/*useless*/

}

system("pause");

return 0;

}

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