โปรแกรมคำนวณน้ำประปา

#include  "stdio.h"

#include "conio.h"

void main()

{

int end=0,unit,price,total;

char choice;

do

{

clrscr();

gotoxy(20,5);printf("Calculate Papa\n");

gotoxy(20,6);printf("1. Rate\n");

gotoxy(20,7);printf("2. Calculate\n");

gotoxy(20,8);printf("3. Exit");

switch (choice=getch())

{

case '1' :

clrscr();

                        gotoxy(20,5);printf("0 -  10 unit   2 Baht/unit\n");

gotoxy(20,6);printf("11 - 20 unit  4 Baht/unit\n");

gotoxy(20,7);printf("> 20 unit      5 Baht/unit\n");

gotoxy(20,9);printf("Press any key to continue");

getch();

end = 0;

break;

case '2' :

case2: clrscr();

                gotoxy(20,5);printf("Unit : ");scanf("%d",&unit);

if (unit > 0 && unit <= 10) price = 2;

else if (unit >=11 && unit <=20) price = 4;

else if (unit > 20) price = 5;

else goto case2;

total = unit * price;

gotoxy(20,6);printf("%d Baht/unit",unit);

gotoxy(20,7);printf("Pay %3d Baht",total);

gotoxy(20,9);printf("Press any key to continue");

getch();

end = 0;

break;

case '3' :

end = 1;

break;

// default :  goto again;

}

}

while (end == 0);

}

พัฒนาโปรแกรมเพื่อทำการแสดงผลดังตัวอย่าง (File name: star.cpp)

*
**
***

****

#include "stdio.h"

#include "conio.h"

#include "string.h"

void main()

{

int count=20,i;

char star[20] = "";

clrscr();

for(i=1;i<=count;i++)  printf("%s\n", strcat (star,"*"));

}

โปรแกรมเพื่อหาผลรวมของตัวเลขคู่ และเลขคี่ ที่อยู่ระหว่าง 0 ถึง 100

#include "stdio.h"

#include "conio.h"

void main()

{

int sum1=0,sum2=0,i;

clrscr();

for(i=1;i<=100;i++) 

if (i%2==0) sum1+=i; else sum2+=i;

printf("Odd Value: 1+3+5+7+9+11+…+99=%d\n",sum2);

printf("Even Value: 2+4+6+8+10+12+…+100=%d\n",sum1);

getch();

}

โปรแกรมแสดงเลขคู่

#include "stdio.h"

#include "conio.h"

void main()

{

int i=2,num;

clrscr();

printf("Input Num :");scanf("%i",&num);

while (i <= num)

{

printf("%i ",i);

i+=2;

}

getch();

}

โปรแกรมแสดงเลข 1 – 20

#include "stdio.h"

#include "conio.h"

void main()

{

int i;

clrscr();

for(i=1;i<=20;i++) 

{

printf("%i ",i);

    }

getch();

}

โปรแกรมเพื่อรับจำนวนเงินบาท

#include "stdio.h"

#include "conio.h"

void main() 

{

int money,bank1000 =0 ,bank500 =0 ,bank100 =0,bank50 =0 ,bank20=0,bank10 =0 ,bank5 =0 ,bank1 = 0;

clrscr();

printf("Money = ");scanf("%d",&money);

if (money >= 1000)

{

  bank1000 = div(money,1000);

  money = money - (bank1000 * 1000);

}

if (money >= 500)

{

  bank500 = div(money,500);

  money = money - (bank500 * 500);

}

if (money >= 100)

{

  bank100 = div(money,100);

  money = money - (bank100 * 100);

}

if (money >= 50)

{

  bank50 = div(money,50);

  money = money - (bank50 * 50);

}

    if (money >= 20)

{

  bank20 = div(money,20);

  money = money - (bank20 * 20);

}

if (money >= 10)

{

bank10 = div(money,10);

money = money - (bank10 * 10);

   }

if (money >= 5)

{

bank5 = div(money,5);

money = money - (bank5 * 5);

} 

if (money >= 0) bank1 = money;

else

{

printf("Money Incorret Type\n");

printf("Press Any Key To Exit\n");

exit();

    }

printf(" 1000 = %d\n",bank1000);

printf("  500 = %d\n",bank500);

printf("  100 = %d\n",bank100);

printf("   50 = %d\n",bank50);

printf("   20 = %d\n",bank20);

printf("   10 = %d\n",bank10);

printf("    5 = %d\n",bank5);

printf("    1 = %d\n",bank1);

   getch();

}

โปรแกรมรับตัวอักษรภาษาอังกฤษ

#include "stdio.h"

#include "conio.h"

#include "ctype.h"

void main()

{

char engchar;

clrscr();

printf("Input English charater :");scanf("%s",&engchar);

engchar =  toupper(engchar);

if ( engchar == 'A'  ||engchar == 'E' ||engchar == 'I'  ||engchar == 'O' || engchar == 'U' ) printf ("%c Is ddddd",engchar);

 else

printf("%c In aaa",engchar);

getch();

}

โปรแกรม สำหรับคำนวณน้ำหนักมาตรฐาน

#include

#include

void main()

{

float weight,height,standard;

char gender,name[30];

    clrscr();

    printf("Input Name     : ");scanf("%s",&name);

    printf("Input Height   : ");scanf("%f",&height);

    printf("Input Weight   : ");scanf("%f",&weight);

    printf("Input Gender   : ");scanf("%s",&gender);

    printf("\n");

    printf("\n");

    printf("\n");

    if (gender =='M' || gender == 'm') standard = height - 100;

       else  standard = height - 110;

    if ( standard == weight) printf("%s Weight Is Standard",name);

       else if (standard > weight) printf("%s Weight Is Under Standard %.2f Kg",name,standard-weight);

       else  printf("%s Weight Is Over Standard %.2f Kg",name,weight-standard);

    getch();

}

โปรแกรมเครื่องคิดเลข

#include

#include

void main() 

{

int num1,num2;

float total;

char mathoperator;

clrscr();

printf("Input First Number         : ");scanf("%d",&num1);

printf("Input Second  Number       : ");scanf("%d",&num2);

printf("Input Operator [+, -, *, /]:  ");scanf("%s",&mathoperator);

  if (mathoperator =='+') total = num1+num2;

else  if (mathoperator =='-') total = num1-num2;

else  if (mathoperator =='*') total = num1*num2;

 else  if (mathoperator =='/') total = num1/num2;

  else

  {

  printf("Wrong Operator\n");

  printf("Press Any Key to Exit\n");

  getch();

  exit();

  }

printf("Output : %d %c %d = %.0f",num1,mathoperator,num2,total);

getch();

}

โปรแกรมรับคะแนนกลางภาค ปลายภาค

#include

#include

void main()

{

int mid,final,sum;

clrscr();

printf("Input Score Midterm = ");scanf("%d",&mid);

printf("Input Score Final   = ");scanf("%d",&final);

    sum = mid + final;

printf("Sum Score           = %d\n",sum);

if (sum >= 80)

{

printf("Grade               = A ");

}

else if (sum >= 70)

{

printf("Grade               = B ");

}

else if (sum >= 60)

{

printf("Grade               = C ");

}

else if (sum >= 50)

{

printf("Grade               = D ");

}

else

{

printf("Grade               = E ");

}

getch();

}

โปรแกรมรับตัวเลข 0-100 50_3.cpp

#include

#include

void main()

{

int number;

clrscr();

printf("Input number 0-100 :");scanf("%d",&number);

if (number > 50)

{

printf("Number Is  > 50 ");

}

else if (number <>

{

printf("Number Is <>);

}

else

{

printf("Number Is = 50");

}

getch();

}

โปรแกรมเพื่อรับตัวเลข 0-100

#include

#include

void main()

{

int number;

clrscr();

printf("Input number 0-100 :");scanf("%d",&number);

if (number > 50)

{

    printf("Number Is ");

}else

{

  printf("Number Is ");

}

getch();

}