C programming Solution (Basic I/O & Decision Control Structure Questions)

Write a program to enter two number and find product.

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c;

printf("Enter first number:");

scanf("%d",&a);

printf("Enter second number:");

scanf("%d",&b);

c=a*b;

printf("The Product is: %d", c);

getch();

}

2) Write a program to calculate area of triangle.

#include<stdio.h>
#include<conio.h>
void main()
{

int b,h;

float a;

printf("Enter breadth of triangle:");

scanf("%d",&b);

printf("Enter height of triangle: ");

scanf("%d",&h);

a= 0.5*b*h;

printf("Area is %f",a);

getch();

}

3) Write a program to enter two number and perform all arithmetic numbers.

#include<stdio.h>

#include<conio.h>

void main()

{

int x,y,a,d,p,di,mo;

printf("Enter first number:");

scanf("%d",&x);

printf("Enter second number:");

scanf("%d",&y);

a=x+y;

d=x-y;

p=x*y;

di=x/y;

mo=x%y;

printf("The sum is: %d \n", a);

printf("The difference is: %d \n", d);

printf("The product is: %d\n", p);

printf("The Division is: %d\n", di);

printf("The Remainder is: %d\n", mo);

getch();

}

Write a program to calculate compound Interest.

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()

{

int p,t,r;

int c;

printf("Enter principal, time and rate");

scanf("%d%d%d",&p,&t,&r);

c=p*(pow((1+r*0.01),t)) -p;

printf("Compound Interest is %d",c);

getch();

}

Write a program to enter length of any one side and calculate area and perimeter of square.

#include<stdio.h>
#include<conio.h>

void main()

{

                int l,a,p;

                printf("Enter length of a square:");

                scanf("%d",&l);

                a=l*l;

                p=4*l;

                printf("Area of square is %d \n",a);

                printf("Perimeter of square is %d",p);

getch();

}

Write a program to display folloing outputs using printf() function.

##########

## #######

#include<stdio.h>

#include<conio.h>




void main()

{

               

printf("##########\n");

printf("#\n");

printf("#      \n");

printf("##########\n");

printf("#  \n");

printf("#     ");

getch();

}

Question Related To Library Function

Write a program to show the use of.

<ctype.h> (tolower(char),toupper(char), isupper(),islower(),isdigit(),isalmun() )

#include<stdio.h>

#include<conio.h>

#include<ctype.h>

void main()

{

char lower='a';

char upper='B';

char digit='5';

char alnum='*';




printf("lower to upper: %c \n",toupper(lower));

printf("Upper to lower: %c \n",tolower(upper));

//use of isupper() and islower()

if(islower(lower))

{

                printf("Character is lower\n");

}

if(isupper(upper))

{

                printf("Character is Upper\n");

}

if(isalnum(alnum))

{

                printf("This is alphanumeric");

}

else{

                printf("This is not alphanumeric");

}

getch();

}

b) <Math.h>

floor(), ceil(), squr(),log(),pow(base,pow)

#include<stdio.h>
#include<conio.h>
#include<math.h>

void main()

{

                double num=3.5,base=2,power=3;




                printf("The Ceil of %f is %f \n",num,ceil(num));

                printf("The floor of %f is %f \n",num,floor(num));

printf("The Square Root of %f is %f \n",num,sqrt(num));

                printf("The Logarithm of %f is %f \n",num,log(num));

                printf(" %f raised to power %f is %f \n",base,power,pow(base,power));




getch();

}

Ternary Operators

Solve the following by using ternary operator.

WAP to enter a number and check whether the number is odd or even.

#include<stdio.h>
#include<conio.h>

void main()

{

int a;

printf("Enter a no:");

scanf("%d",&a);




(a%2==0)?printf("The Number is even"):printf("The number is odd");




getch();

}

WAP to check whether the number is positive or negative;

#include<stdio.h>

#include<conio.h>

void main()

{

int a;

printf("Enter a no:");

scanf("%d",&a);

(a>0)?printf("The Number is Positive"):printf("The number is Negative");

getch();

}

Sequential Control Structure

Write a program to ask two ask a number from user and display cube of the number without using library function.

#include<stdio.h>
#include<conio.h>

void main()

{

int a,c;

printf("Enter a no:");

scanf("%d",&a);

c=a*a*a;

printf("The cube of the number is:%d",c);

getch();

}

Write a program to input a number and fint square with and without using math.h libray function.

#include<stdio.h>
#include<conio.h>

#include<math.h>

void main()

{

int a;

printf("Enter a number:");

scanf("%d",&a);

//Without using library function

printf("Square without using library function: %d\n",a*a);

//using library function

int ans=pow(a,2);

printf("Square using library function: %d",ans);

getch();

}

Write a program to enter the length, breadth and height of a box and calculate the total surface area and volume of the cuboid.

#include<stdio.h>
#include<conio.h>
void main()
{

int l,b,h,v,t;

printf("Enter Length of a cuboid:");

scanf("%d",&l);

printf("Enter Breadth of the cuboid:");

scanf("%d",&b);

printf("Enter Height of the cuboid:");

scanf("%d",&h);


t=2*(l*b+b*h+h*l);

v=l*b*h;

printf("The TSA of cuboid is %d \n The Volume of Cuboid is %d",t,v);

getch();

}

WAP to enter radious of circle and calculate area and circumference.

#include<stdio.h>

#include<conio.h>




void main()

{

float r,a,c;

const int pi=22/7;

printf("Enter radius of circle:");

scanf("%f",&r);

a=pi*r*r;

c=2*pi*r;

printf("The area of circle is: %f \n The circumference of circle is: %f",a,c);

getch();

}

Question Related To Decision Control Structure

A) Question related to If() Statement
Write a program to enter the marks of English Subject and print “Pass” if it is 40 or more.

#include<stdio.h>

#include<conio.h>




void main()

{

float m;




printf("Enter your mark:");

scanf("%f",&m);

if(m>=40)

{

                printf("Pass");

}




getch();

}

Write a program to read a number and find odd or even by using if ()

#include<stdio.h>

#include<conio.h>




void main()

{

int n;




printf("Enter a number");

scanf("%d",&n);

if(n%2==0)

{

                printf("Even");

}

if(n%2!=0)

{

                printf("Odd");

}

getch();

}

Write a program to enter the age of a person and print “He can vote”, if the age is 18 or above.

#include<stdio.h>

#include<conio.h>

void main()

{

int age;

printf("Enter a number");

scanf("%d",&age);

if(age>=18)

{

                printf("He can vote");

}

getch();

}

B) Question related to If..Else condition
WAP to enter marks of English and print “Pass” if it is 40 or more, otherwise “Fail”.

#include<stdio.h>

#include<conio.h>

void main()

{

int mark;

printf("Enter your mark:");

scanf("%d",&mark);

if(mark>=40)

{

                printf("Pass");

}

else

{

                printf("Fail");

}




getch();

}

WAP to check input number is negative or non-negative.

#include<stdio.h>

#include<conio.h>




void main()

{

int n;




printf("Enter a number:");

scanf("%d",&n);

if(n>0)

{

                printf("Positive");

}

else

{

                printf("Negative");

}




getch();

}

WAP to enter the age of a person and print “He can vote” if the age is 18 or above, otherwise ” He cannot vote”

#include<stdio.h>

#include<conio.h>

void main()

{

int age;

printf("Enter a number");

scanf("%d",&age);

if(age>=18)

{

                printf("He can vote");

}

else

{

                printf("He can not vote");

}

getch();

}

WAP to check whether given number is odd or even.

#include<stdio.h>

#include<conio.h>




void main()

{

int n;




printf("Enter a number:");

scanf("%d",&n);

if(n%2==0)

{

                printf("Even");

}

else

{

                printf("Odd");

}




getch();

}

WAP to find the greatest number among two numbers entered by the user.

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b;




printf("Enter a number:");

scanf("%d",&a);




printf("Enter Another number:");

scanf("%d",&b);




if(a>b)

{

                printf("%d is greater",a);

}

else

{

                printf("%d is greater",b);

}




getch();

}

c) Question Related to Nested if() else.
WAP to check the greatest among 3 inputs from user by using nested if() else

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c;




printf("Enter first number:");

scanf("%d",&a);

printf("Enter second number:");

scanf("%d",&b);

printf("Enter third number:");

scanf("%d",&c);




if(a>b)

{

                if(a>c)

                {

                                printf("a is greatest");

                }

                else

                {

                                printf("c is greatest");

                }

}

else{

                if(b>c)

                {

                                printf("b is greatest");

                }

                else

                {

                                printf("c is greatest");

                }

}

getch();

}

D) Questions related to If.. else if
WAP to enter a number and print “Positive” if it is greater than 0, “Negative” if it is less than 0 , otherwise print “Zero”.

#include<stdio.h>

#include<conio.h>

void main()

{

int a;




printf("Enter first number:");

scanf("%d",&a);




if(a>0)

{

                printf("Positive");

}

else if(a<0)

{

                printf("Negative");

}

else

{

                printf("Zero");

}




getch();

}

WAP to read marks of 5 subjects and calculate percentage as follows.
percentage>=75 and <=100 Distinction
percentage>= 60 and <75 First division

iii. percentage>=45 and <60 second division

percentage>=35 and <45 Pass division
Else fail

#include<stdio.h>

#include<conio.h>

void main()

{

int m1,m2,m3,m4,m5,percentage;




printf("Enter mark of subject 1: ");

scanf("%d",&m1);

printf("Enter mark of subject 2: ");

scanf("%d",&m2);

printf("Enter mark of subject 3: ");

scanf("%d",&m3);

printf("Enter mark of subject 4: ");

scanf("%d",&m4);

printf("Enter mark of subject 5: ");

scanf("%d",&m5);




percentage=(m1+m2+m3+m4+m5)/5;

printf("Percentage: %d",percentage);




if(percentage>=75 && percentage<=100)

{

                printf("Distinction");

}

else if(percentage>=60 && percentage<75)

{

                printf("First");

}

else if(percentage>=45 && percentage<60)

{

                printf("Second");

}

else if(percentage>=35 && percentage<45)

{

                printf("\n Pass");

}

else

{

                printf("\n Fail");

}







getch();

}

WAP to enter 3 numbers and print the greatest number using if… else if

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c;




printf("Enter first number:");

scanf("%d",&a);

printf("Enter second number:");

scanf("%d",&b);

printf("Enter third number:");

scanf("%d",&c);




if(a>b && a>c)

{

                printf("a is greatest");

}

else if(b>c)

{

                printf("b is greatest");

}

else

{

                 printf("c is greatest");

}




getch();

}

WAP to input any three numbers and find the middle number.

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c;




printf("Enter first number:");

scanf("%d",&a);

printf("Enter second number:");

scanf("%d",&b);

printf("Enter third number:");

scanf("%d",&c);




if((b>a && b<c) || (b>c && b<a))

{

                printf("b is middle number ");

}

else if((a>b && a<c) || (a>c && a<b))

{

                printf("a is middle number");

}

else

{

                 printf("c is middle number");

}




getch();

}

E) Switch()
WAP to print name of days according as number input from keyboard such as 1 for Sunday, 2 for Monday…… 7 for Saturday and other for wring input.

#include<stdio.h>

#include<conio.h>

void main()

{

int choice;




printf("1. sunday \n 2. Monday \n 3. Tuesday \n 4. Wednesday \n 5. Thursday \n 6. Friday \n 7. Saturday");

printf("\n choose anyone, enter number (1,2....7):");




scanf("%d",&choice);




switch(choice)

{

case 1:

printf("Sunday");

break;




case 2:

printf("Monday");

break;




case 3:

printf("Tuesday");

break;




case 4:

printf("Wednesday");

break;




case 5:

printf("Thursday");

break;




case 6:

printf("Sunday");

break;




case 7:

printf("Friday");

break;




default:

printf("Not valid Input");

break;

}

getch();

}

WAP to print the following menu and do the task accordingly.
a) Area of Rectangle
b) Perimeter of Rectangle
c) Area of circle
d) Area of square

#include<stdio.h>
#include<conio.h>

void main()

{

int l,b,r;

char choice;

printf("a. Area of Rectangle \n b. Perimeter of Rectangle \n c. Area of circle \n d. Area of square ");

printf("\n choose anyone, (a,b,c,d):");

scanf("%c",&choice);

switch(choice)

{

case 'a':

printf("Enter lenght of Rectangle: ");

scanf("%d",&l);

printf("Enter Breadth of Rectangle: ");

scanf("%d",&b);

printf("Area of the Rectangle is %d",l*b);

break;

case 'b':

printf("Enter lenght of Rectangle: ");

scanf("%d",&l);

printf("Enter Breadth of Rectangle: ");

scanf("%d",&b);

printf("Perimeter of the Rectangle is %d",2*(l+b));

break;

case 'c':

printf("Enter radious of circle: ");

scanf("%d",&r);

printf("Perimeter of the circle is is %d",2*22/7*r);

break;

case 'd':

printf("Enter length of square: ");

scanf("%d",&l);

printf("area of the suare is is %d",l*l);

break;

default:

printf("Not valid Input");

break;

}

getch();

}

WAP to print the following menu and do the task accordingly

Menu

Addition of two numbers

Subtraction of two numbers

Multiplication of two numbers

Division of two numbers

Exit

Note: user’s choice should be ‘a’ for addition, ‘s’ for subtraction, ‘m’ for multiplication, ‘d’ for division and ‘e’ for exit.

#include<stdio.h>
#include<conio.h>

void main()

{

int a,b;

char choice;

printf(" Addition of two numbers \n Substraction of two numbers \n Multiplication of two numbers \n Division Of Two Numbers \n Exit");

printf("'a' for addition, 's' for subtraction, 'm' for multiplication, 'd' for division and 'e' for exit.");

scanf("%c",&choice);

switch(choice)

{

case 'a':

printf("Enter first Number: ");

scanf("%d",&a);

printf("Enter second Number: ");

scanf("%d",&b);

printf("Additon of two number is %d",a+b);

break;

case 's':

printf("Enter first Number: ");

scanf("%d",&a);

printf("Enter second Number: ");

scanf("%d",&b);

printf("Substraction of two number is %d",a-b);

break;

case 'm':

printf("Enter first Number: ");

scanf("%d",&a);

printf("Enter second Number: ");

scanf("%d",&b);

printf("Multiplication of two number is %d",a*b);

break;

case 'd':

printf("Enter first Number: ");

scanf("%d",&a);

printf("Enter second Number: ");

scanf("%d",&b);

printf("Divison of two number is %d",a/b);

break;

case 'e':

break;


default:

printf("Invalid Input ");

break;

}


getch();

}

Question related To Unconditional Statement.
1. WAP to allow user to enter only value under 100 by using Goto statement.

#include<conio.h>
#include<stdio.h>
void main()
{
int n;
label:
 printf("Enter a number ");
 scanf("%d",&n);

if(n>99)
{
  goto label;
}
else
{
  printf("You have entered value under 100");
}
getch();
}