Black-White Mubin | মুবিনের রাফখাতা: May 2018

1. Program to print Name

#include<stdio.h>
main()
{
printf("My name is MUBIN");
}

2. Program to print Name;Id;Dept;University name

#include<stdio.h>
main()
{
printf("My name is MUBIN\n");
printf("My ID is 1103043\n");
printf("My Dept. is EEE\n");
printf("My University is BAUET\n");
}

3. Addition
#include<stdio.h>
main()
{
int a,b,sum;
a=10;
b=20;
sum=a+b;
printf("sum= %d + %d = %d \n",a,b,sum);

}

4. Add two numbers (take input from keyboard)

#include<stdio.h>

main()

{

int a,b,sum;

printf("Enter a:");

scanf("%d",&a);

printf("Enter b:");

scanf("%d",&b);

sum=a+b;

printf("Sum= %d + %d = %d\n",a,b,sum);

}

5. Mini Calculator

#include<stdio.h>

main()

{

float a,b,sum,sub,multi,div;

printf("Enter a:"); scanf("%f",&a);

printf("Enter b:"); scanf("%f",&b);

sum=a+b;

sub=a-b;

multi=a*b;

div=a/b;

printf("Sum= %f + %f = %f\n",a,b,sum);

printf("Sub= %f - %f = %f\n",a,b,sub);

printf("Multi= %f * %f = %f\n",a,b,multi);

printf("Div= %f / %f = %f\n",a,b,div);

}

6. Find Series and Parallel Resistances

#include<stdio.h>

main()

{

float R1,R2,Rs,Rp;

printf("Enter R1:"); scanf("%f",&R1);

printf("Enter R2:"); scanf("%f",&R2);

Rs=R1+R2;

Rp=(R1*R2)/(R1+R2);

printf("Rs= %.2f \nRp= %.2f\n",Rs,Rp);

}

7. Y to Delta conversion

#include<stdio.h>

main()

{

float R1,R2,R3,R12,R23,R31;

printf("Enter R1, R2, R3 serially:\n");

scanf("%f %f %f",&R1,&R2,&R3);

R12=((R1*R2)+(R2*R3)+(R3*R1))/(R3);

R23=((R1*R2)+(R2*R3)+(R3*R1))/(R1);

R31=((R1*R2)+(R2*R3)+(R3*R1))/(R2);

printf("R12= %.2f\nR23=%.2f\nR31=%.2f\n",R12,R23,R31);

}

8. Delta to Y conversion

#include<stdio.h>

main()

{

float r12,r23,r31,r1,r2,r3;

printf("Enter r12:"); scanf("%f",&r12);

printf("Enter r23:"); scanf("%f",&r23);

printf("Enter r31:"); scanf("%f",&r31);

r1=(r12*r31)/(r12+r23+r31);

r2=(r12*r23)/(r12+r23+r31);

r3=(r23*r31)/(r12+r23+r31);

printf("*************Y Resistances******************\n");

printf("r1=%.2f\nr2=%.2f\nr3=%.2f",r1,r2,r3);

}

9. Sum and Average of Three numbers

//sum and average by MUBIN

#include<stdio.h>

main()

{

float a,b,c;

printf("Enter a,b,c serially:\n");

scanf("%f %f %f",&a,&b,&c);

printf("sum=%.2f \navg= %.2f",a+b+c,(a+b+c)/3);

}

10. Relational operators

#include<stdio.h>

main()

{

int a=3,b=2;

printf("a>b :%d\n",a>b);

printf("a<b :%d\n",a<b);

printf("a>=b :%d\n",a>=b);

printf("a<=b :%d\n",a<=b);

printf("a==b:%d\n",a==b);

printf("a!=b :%d\n",a!=b);

}

11. Logical Operators

#include<stdio.h>

main()

{

int a=1,b=2,c=3;

printf("a==1 && b==2:%d\n",a==1 && b==2);

printf("a==1 && b==4:%d\n",a==1 && b==4);

printf("a==1 || b==2:%d\n",a==1 || b==2);

printf("a==1 || b==4:%d\n",a==1 || b==4);

printf("a==4 || b==5:%d\n",a==4 || b==5);

printf("a==1 && b==2 && c==3:%d\n",a==1 && b==2 && c==3);

printf("a==1 && b==2 && c==4:%d\n",a==1 && b==2 && c==4);

printf("a==1 || b==2 || c==3:%d\n",a==1 || b==2 || c==3);

printf("a==4 || b==5 || c==6:%d\n",a==4 || b==5 || c==6);

}

12. Incremental and Deccremental operators
#include<stdio.h>
main()
{
int a=1,b=3;
printf("Before increment,a= %d\n",a);
a++;//a=a+1

printf("After increment,a= %d\n",a);
printf("Before decrement,b= %d\n",b);
b--;//b=b-1
printf("After decrement,b= %d\n",b);
}

13. Modulus Operator (Reminder )
#include<stdio.h>
main()
{
int a,b,rem;
printf("Enter a:"); scanf("%d",&a);
printf("Enter b:"); scanf("%d",&b);
rem=a%b;
printf("Reminder= %d \n",rem);
}

14. Find Area of a Circle

//problem to find circular area

#include<stdio.h>

#define PI 3.1416

main()

{

float r,area;

printf("Enter radius:"); scanf("%f",&r);

area=PI*r*r;

printf("Area= %.2f",area);

}

15. if else statement

#include<stdio.h>

main()

{

int today;

int sat=1,sun=2,mon=3,tue=4,wed=5,thu=6,fri=7;

printf("Enter today:");

scanf("%d",&today);

if(today==thu)

{

printf("Go to Home\n");

}

else

{

printf("Go to Hell\n");

}

16. if else ladder

#include<stdio.h>

main()

{

int today;

int sat=1,sun=2,mon=3,tue=4,wed=5,thu=6,fri=7;

printf("Enter today:\n");

printf("sat=1\nsun=2\nmon=3\ntue=4\nwed=5\nthu=6\nfri=7\n");

scanf("%d",&today);

if(today==sat){printf("Goto DHAKA\n");}

else if(today==sun){printf("Goto RAJSHAHI\n");}

else if(today==mon){printf("Goto KHULNA\n");}

else if(today==tue){printf("Goto SYLHET\n");}

else if(today==wed){printf("Goto CHATTAGRAM\n");}

else if(today==thu){printf("Goto BARISHAL\n");}

else if(today==fri){printf("Goto RANGPUR\n");}

else {printf("Goto HELL\n");}

}

17. Positive, negative, zero

#include<stdio.h>

main()

{

int n;

printf("Enter a number:");

scanf("%d",&n);

if(n>0)

{

printf("It is a positive number!!\n");

}

else if(n<0)

{

printf("It is a negative number!!\n");

}

else

{

printf("It is zero\n");

}

18. Leap Year

#include<stdio.h>

main()

{

int year;

printf("Enter a year:");

scanf("%d",&year);

if(year%4==0)

{

printf("It is a LEAP YEAR!!\n");

}

else

{

printf("It is not a LEAP YEAR!!\n");

}

19. Grading System

#include<stdio.h>
main()
{
int m;
printf("Enter marks:"); scanf("%d",&m);
if(m>=80 && m<=100){printf("A+\n");}
else if(m>=70 && m<=79){printf("A\n");}
else if(m>=60 && m<=69){printf("A-\n");}
else if(m>=50 && m<=59){printf("B\n");}
else if(m>=40 && m<=49){printf("C\n");}
else if(m>=33 && m<=39){printf("D\n");}
else if(m>=0 && m<=32){printf("F\n");}
else {printf("INVALID INPUT, PLZ TRY AGAIN\n");}
}

20. parallel switch

#include<stdio.h>

main()

{

int s;

printf("Enter s:"); scanf("%d",&s);

if(s==1){printf("RED bulb ON\n");}

else if(s==2){printf("GREEN bulb ON\n");}

else if(s==3){printf("BLUE bulb ON\n");}

else {printf("NO bulb ON\n");}

}

21. switch case

#include<stdio.h>

main()

{

int s;

printf("Enter s:"); scanf("%d",&s);

switch(s)

{

case 1: printf("RED bulb ON\n");

break;

case 2: printf("GREEN bulb ON\n");

break;

case 3: printf("BLUE bulb ON\n");

break;

default: printf("NO bulb is ON\n");

break;

}

22. Leap year - using switch case

#include<stdio.h>

main()

{

int year;

printf("Enter year:");

scanf("%d",&year);

switch(year%4)

{

case 0: printf("It is a LEAP YEAR\n");

break;

case 1: printf("It is not a LEAP YEAR\n");

break;

default:printf("It is not a LEAP YEAR\n");

break;

}

23. Month & Days switch case (generalized)

#include<stdio.h>

main()

{

int month;

printf("Enter month:\n");

printf("1.Jan\n2.Feb\n3.March\n4.April\n5.May\n6.June\n7.Jul\n8.Aug\n9.Sep\n10.Oct\n11.Nov\n12.Dec\n");

scanf("%d",&month);

switch(month)

{

case 2:

printf("DAYs=28\n"); break;

case 1:

case 3:

case 5:

case 7:

case 8:

case 10:

case 12:

printf("DAYs=31\n"); break;

case 4:

case 6:

case 9:

case 11:

printf("DAys=30\n"); break;

}

24. Month & Days switch case (advanced)

#include<stdio.h>

main()

{

int month,year;

printf("Enter year:");

scanf("%d",&year);

if(year%4==0)

{

printf("Enter month:\n");

printf("1.Jan\n2.Feb\n3.March\n4.April\n5.May\n6.June\n7.Jul\n8.Aug\n9.Sep\n10.Oct\n11.Nov\n12.Dec\n");

scanf("%d",&month);

switch(month)

{

case 2:

printf("DAYs=29\n"); break;

case 1:

case 3:

case 5:

case 7:

case 8:

case 10:

case 12:

printf("DAYs=31\n"); break;

case 4:

case 6:

case 9:

case 11:

printf("DAys=30\n"); break;

}

else

{

printf("Enter month:\n");

printf("1.Jan\n2.Feb\n3.March\n4.April\n5.May\n6.June\n7.Jul\n8.Aug\n9.Sep\n10.Oct\n11.Nov\n12.Dec\n");

scanf("%d",&month);

switch(month)

{

case 2:

printf("DAYs=28\n"); break;

case 1:

case 3:

case 5:

case 7:

case 8:

case 10:

case 12:

printf("DAYs=31\n"); break;

case 4:

case 6:

case 9:

case 11:

printf("DAys=30\n"); break;

}

25. Relationship between three variables

#include<stdio.h>

main()

{

int a,b,c;

printf("Enter a,b,c:\n");

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

if(a>b && a>c)

{

if(b>c){printf("a>b>c");}

else {printf("a>c>b");}

}

if(b>a && b>c)

{

if(a>c){printf("b>a>c");}

else {printf("b>c>a");}

}

if(c>a && c>b)

{

if(a>b){printf("c>a>b");}

else {printf("c>b>a");}

}

26. DBBL Mobile banking

#include<stdio.h>

main()

{

printf("**********Welcome to DBBL Mobile Banking******\n");

int a1=1,a2=2,a3=3,a4=4,b1=1,b2=2,b3=3,c1=1,c2=2,d1=1,d2=2,op;

int a,m;

printf("1.Payment\n2.My Account\n3.Topup\n4.Exit\n");

printf("Enter option:"); scanf("%d",&op);

if(op==3)

{

printf("1.Self\n2.Others\n3.Exit\n");

scanf("%d",&op);

if(op==1){

printf("Enter amount:"); scanf("%d",&a);

printf("%d Taka has been Flexi loaded!!",a);

}

else if(op==2){printf("Enter Mob No:"); scanf("%d",&m);}

else if(op==3){main();}

else {printf("ERROR!!");}

}

else

{

main();

}

27. while loop

#include<stdio.h>

main()

{

int i=1;

while(i<=5)

{

printf("My name is MUBIN\n");

i++;

}

28. do while loop

#include<stdio.h>

main()

{

int i=1;

{

printf("My name is MUBIN\n");

i++;

}

while(i<=5);

}

29. for loop

#include<stdio.h>

main()

{

int i;

for(i=1;i<=5;i++)

{

printf("My name is Mubin\n");

}

30. print 1 to 100

#include<stdio.h>

main()

{

for(int i=1;i<=100;i++)

{

printf("%d\n",i);

}

31. print 100 to 1

#include<stdio.h>

main()

{

for(int i=100;i>=1;i--)

{

printf("%d\n",i);

}

32. sum of a linear series print file as .cpp)

#include<stdio.h>

main()

{

int sum=0;

for(int i=1;i<=10;i++)

{

sum=sum+i;

}

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

}

33. Jumping from a loop

#include<stdio.h>

main()

{

for(int i=1;i<=5;i++)

{

if(i==3){break;}

else{printf("i=%d\n",i);}

}

34. Skipping a part of a loop

#include<stdio.h>

main()

{

for(int i=1;i<=5;i++)

{

if(i==3){continue;}

else{printf("i=%d\n",i);}

}

35. Descending Triangle

#include<stdio.h>

main()

{

int n;

printf("Enter n:"); scanf("%d",&n);

for(int i=1;i<=n;i++)

{

for(int j=0;j<=n-i;j++)

{

printf("*");

}

printf("\n");

}

36. Ascending Triangle

37. Pyramid

#include<stdio.h>

main()

{

int n;

printf("Enter n:");

scanf("%d",&n);

for(int i=1;i<=n;i++)

{

for(int j=0;j<=n-i;j++){printf(" ");}

for(int j=1;j<=i;j++){printf(" *");}

printf("\n");

}

38. Factorial of n

#include<stdio.h>

main()

{

int n,sum=1;

printf("Enter n:");

scanf("%d",&n);

for(int i=1;i<=n;i++)

{

sum=sum*i;

}

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

}

39. Prime number

#include<stdio.h>

main()

{

int n,dummy=0;

printf("Enter n:");

scanf("%d",&n);

for(int i=2;i<n;i++)

{

if(n%i==0){dummy=1;}

else {dummy=0;}

}

if(dummy==1)

{

printf("Prime");

}

else

{

printf("Not Prime");

}

40. Febonacii Series

#include<stdio.h>

main()

{

int i,n,t1=0,t2=1,nextterm;

printf("Enter no. of limit n:");

scanf("%d",&n);

printf("Febonacii series:");

for(i=1;i<=n;i++)

{

if(i==1){printf("%d\n",t1); continue;}

if(i==2){printf("%d\n",t2);continue;}

nextterm=t1+t2;

t1=t2;

t2=nextterm;

printf("%d\n",nextterm);

}

41. Jumping using "break"

#include<stdio.h>
main()
{
for(int i=1;i<=5;i++)
{
if(i==4){break;}
printf("i=%d I am Mr. Nobody\n",i);
}
}

42. Skipping using "continue"

#include<stdio.h>
main()
{
for(int i=1;i<=5;i++)
{
if(i==4){continue;}
printf("i=%d I am Mr. Nobody\n",i);
}
}

43. Nested for loop

#include<stdio.h>
main()
{
for(int i=1;i<=3;i++)
{
for(int j=1;j<=3;j++)
{
printf("i=%d j=%d I Frankenestine\n",i,j);
}
}
}

44. Sum and average of a linear series

#include<stdio.h>

main()

{

int sum=0,n;

float avg;

printf("Enter n:");

scanf("%d",&n);

printf("0");

for(int i=1;i<=n;i++)

{

sum=sum+i;

printf("+%d",i);

}

avg=float(sum)/n;

printf("=%d \naverage=%.2f\n\n",sum,avg);

}

45. Sum of even numbers

#include<stdio.h>

main()

{

int sum=0,n;

float avg;

printf("Enter n:");

scanf("%d",&n);

printf("0");

for(int i=2;i<=n;i=i+2)

{

sum=sum+i;

printf("+%d",i);

}

avg=float(sum)/(n/2);

printf("=%d \naverage=%.2f\n\n",sum,avg);

}

46. Sum of Odd numbers

#include<stdio.h>

main()

{

int sum=0,n;

float avg;

printf("Enter n(even):");

scanf("%d",&n);

printf("0");

for(int i=1;i<=n;i=i+2)

{

sum=sum+i;

printf("+%d",i);

}

avg=float(sum)/(n/2);

printf("=%d \naverage=%.2f\n\n",sum,avg);

}

47. Sum of non linear series

#include<stdio.h>

main()

{

int sum=0,n;

float avg;

printf("Enter n(even):");

scanf("%d",&n);

printf("0");

for(int i=1;i<=n;i=i*2)

{

sum=sum+i;

printf("+%d",i);

}

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

}

48.Array- Run time initialization\

//run time initializatioin

#include<stdio.h>

main()

{

int a[5];

printf("Enter 5 elements of array:\n");

for(int i=0;i<5;i++){scanf("%d",&a[i]);}

printf("\nYou have entered:\n");

for(int i=0;i<5;i++){printf("%d \n",a[i]);}

}

49. Array- Run time initialization alternative

//run time initializatioin

#include<stdio.h>

main()

{

int a[50],n;

printf("Enter n:"); scanf("%d",&n);

printf("Enter %d elements of array:\n",n);

for(int i=0;i<n;i++)

{

printf("Enter a[%d]:",i);

scanf("%d",&a[i]);

}

printf("\nYou have entered:\n");

for(int i=0;i<n;i++)

{

printf("a[%d]=%d \n",i,a[i]);

}

50. Program for "Bubble Sorting"

#include<stdio.h>

#include<conio.h>

main()

{

int i,j,n,t; int a[15];

printf("enter n:");

scanf("%d",&n);

printf("enter %d element of array:\n",n);

for(i=1;i<=n;i++)

{scanf("%d",&a[i]);}

for(i=1;i<=n-1;i++)

{

for(j=1;j<=n-i;j++)

{

if(a[j]<a[j+1])

{t=a[j];

a[j]=a[j+1];

a[j+1]=t;}

else continue;

}

printf("after sorting:\n");

for(i=1;i<=n;i++)

{printf("%d\n",a[i]);}

}

51. Input and output of string

#include<stdio.h>

main()

{

char a[30];

printf("Enter a word:");

scanf("%s",a);

printf("You have Entered: ");

printf("%s",a);

}

52. String- scan a sentence from keyboard

#include<stdio.h>

main()

{

char a[30];

printf("Enter a word:");

scanf("%[^\n]",a);

printf("You have Entered: ");

printf("%s",a);

}

53. String- take a sentence from keyboard (using gets and puts)

#include<stdio.h>

main()

{

char a[30];

printf("Enter a word:");

gets(a);

printf("You have Entered: ");

puts(a);

}

54. Pointer- Understanding pointer (Access the value of a variable using pointer

#include<stdio.h>

main()

{

int a;

int *p;

a=10;

p=&a;

printf("The value of a= %d\n",a);

printf("The address of a= %u\n",&a);

printf("The address of a= %u\n",p);

printf("The value of a= %d\n",*p);

}

55. User Defined Function- Sum

#include<stdio.h>

int sum(int a,int b);

main()

{

int a,b;

sum(2,3);

sum(10,20);

sum(30,40);

}

int sum(int a,int b)

{

printf("sum= %d+ %d = %d\n",a,b,a+b);

}

56. User Defined Function- Design a mini calculator

#include<stdio.h>

int sum(int a,int b){printf("sum= %d + %d = %d\n",a,b,a+b);}

int sub(int a,int b){printf("sub= %d - %d = %d\n",a,b,a-b);}

int multi(int a,int b){printf("multi= %d * %d = %d\n",a,b,a*b);}

int div(int a,int b){printf("div= %d / %d = %d\n",a,b,a/b);}

main()

{

int a,b,option;

printf("Enter an option:\n1.sum\n2.sub\n3.multi\n4.div\n");

scanf("%d",&option);

printf("Enter a:"); scanf("%d",&a);

printf("Enter b:"); scanf("%d",&b);

if(option==1) {sum(a,b);}

else if(option==2){sub(a,b);}

else if(option==3){multi(a,b);}

else if(option==4){div(a,b);}

else{printf("Sorry. Please try again\n");}

}

57. C++ (Print name, ID, Dept, University

#include<iostream>

using namespace std;

main()

{

cout<<"MUBIN"<<endl<<"1103043"<<endl<<"EEE"<<endl<<"KUET"<<endl;

}

58. C++ (Find sum)

#include<iostream>

using namespace std;

main()

{

int a,b,sum;

cout<<"Enter a number:";

cin>>a;

cout<<"Enter another number:";

cin>>b;

sum=a+b;

cout<<"sum="<<a<<"+"<<b<<"=o"<<sum;

}

59. Write a program in C++ to understand Object Oriented Programming (OOP)

60. Understanding OOP

//using same function in different class
#include<iostream>
using namespace std;
class biral
{
public:
    void name(){cout<<"WHITE CAT"<< endl;}
    void barking(){cout<<"MEW MEW..."<< endl;}
};
class sagol
{
public:
    void name(){cout<<"LALTU"<< endl;}
    void barking(){cout<<"VA VA....."<< endl;}

};
class goru
{
public:
    void name(){cout<<"MOHESH"<< endl;}
    void barking(){cout<<"HUMBA HUMBA...."<< endl;}
};
main()
{

    biral obj1;
    sagol obj2;
    goru obj3;
    obj1.name();
    obj1.barking();
    obj2.name();
    obj2.barking();
    obj3.name();
    obj3.barking();
}