Code for Tomorrow , Serve the humanity.: SOLUTION- CHAPTER-03: ( Operators and Expression) from PROGRAMMING IN ANSI C: E BALA GURUSHAMY

SOLUTION- CHAPTER-02: ( Operators and Expression)

PROGRAMMING IN ANSI C: E BALA GURUSHAMY

EXERCISE NO.3.1: Given the values of the variables X,Y and Z write a program to rotate their values such that X has the value of Y,Y has the value of Z and Z has the value of X.

SOLUTION:

#include

void main()

{

int x,y,z,temp;

clrscr();

printf("Enter the value of x,y,z\n");

scanf("%d %d %d",&x,&y,&z);

temp=x;

x=y;

y=z;

z=temp;

printf("%d %d %d",x,y,z);

getch();

}

EXERCISE NO.3.2: write a program that reads a floating-point number and then displays right-most digit of the integral part of the number.

SOLUTION:

#include

void main()

{

int a,e;

float p;

clrscr();

printf("Enter the value of p\n");

scanf("%f",&p);

a=int(p);

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

e=a%10;

if(a>10)

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

getch();

}

EXERCISE NO.3.3. Modify the above program to display to right-most digits of the integral part of the number.

SOLUTION:

#include

void main()

{

int a,e;

clrscr();

printf("Enter the value of a\n");

scanf("%d",&a);

e=a%100;

if(a>100)

printf("%d\n%d\n",a,e);

getch();

}

3.4: Write a program that will obtain the length and width of a rectangle from the user and compute its area and perimeter.

SOLUTION:

#include

void main()

{

int length,width;

clrscr();

float area,perimeter;

printf("Enter the value of length,width\n");

scanf("%d %d",&length,&width);

area=(length*width);

perimeter=2*(length+width);

printf("%f %f",area,perimeter);

getch();

}

EXERCISE NO.3.5: Given an integer number, write a program that displays the number as follows:

First line: all digits

Second line: all except first digit

Third line: all except first two digits

…………

Last line: The last digit

For example the number 5678 will be displayed as:

5 6 7 8

6 7 8

SOLUTION:

#include

void main()

{

int a,b,c,e,x;

float p;

clrscr();

printf("Enter the value of p\n");

scanf("%f",&p);

a=int(p);

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

e=a%10000;

b=e%1000;

c=b%100;

x=c%10;

if(a>10000)

printf("%d\n%d\n%d\n%d\n",a,e,b,c,x);

else if(a>1000)

printf("%d\n%d\n%d\n",a,b,c,x);

else if(a>100)

printf("%d\n%d\n",a,c,x);

else if(a>10)

printf("%d\n%d\n",a,x);

getch();

}

EXERCISE NO.3.6: The straight-line method of computing the yearly depreciation of the value of an item is given by

Depreciation=

Write a program to determine the salvage value of an item when the purchase price , years of service, and the annual depreciation are given.

SOLUTION:

#include

void main()

{

int years;

float s, d,p;

clrscr();

printf("Enter the value of years,d,p\n");

scanf("%d %f %f",&years,&d,&p);

s=p-(years*d);

printf("%f",s);

getch();

}

EXERCISE NO.3.7: Write the program that will read a real number from the keyboard and print the following output in one line:

Smallest integer The given Largest integer

not less then number not greater than

the number the number

SOLUTION:

#include

void main()

{

float m;

int n,p;

clrscr();

printf("Enter the value of m\n");

scanf("%f",&m);

n=(m/1)+1;

p=m;

printf("%d %f %d",n,m,p);

getch();

}

EXERCISE NO.3.8: The total distance travelled by a vehicle in t seconds is given by

Distance= ut+(at²)/2

Where u is the initial velocity( meter per second),a is the acceleration (meter per second²). Write a program to evaluate the distance travelled at intrevales of time, give the value of u and a. the program should provide the flexibility to the user to select his own time intervals and repeat the calculation for different value of u and a.

SOLUTION:

#include

void main()

{

int a,u,t;

float distance;

clrscr();

printf("Enter the value of a,u,t\n");

scanf("%d %d %d",&a,&u,&t);

distance=u*t+(a*t*t)/2;

printf("%f",distance);

getch();

}

EXERCISE NO.3.9: In inventory management ,the Economic Order Quantity for a single item is given by

EOQ=sqrt { ( 2*demand rate*setup rate ) / ( holding cost per item per unit time ) }

And the Time Between Orders

TBO =sqrt { ( 2* setup cost ) / (demand rate * holding cost per item per unit time ) }

SOLUTION 1:

#include

void main()

{ float EOQ,d,s,h,x;

Clrscr();

printf("Enter the value of d,s,h\n");

scanf("%f %f %f",&d,&s,&h);

x=(2*d*s)/h;

EOQ=sqrt(x);

printf("%f",EOQ);

getch();

}

SOLUTION 2:

#include

void main()

{

float x,s,d,h,TOB;

clrscr();

printf("Enter the value of s,d,h\n");

scanf("%f%f%f",&s,&d,&h);

x=(2*s)/(d*h);

TOB=sqrt(x);

printf("%f",TOB);

getch();

}

EXERCISE NO.3.10: For a certain electrical circuit with an inductance L and resistance R,the damped natural frequency is given by

Frequency =sqrt { (1/L*C ) - ( R*R/4*C*C ) }

It is desired to study the variation of this frequency with C(capacitance).Write a program to calculate the frequency for different values of C starting from 0.01 to 0.1 in steps of 0.01.

SOLUTION:

#include

void main()

{

float L,R,C,x,a,b,F;

clrscr();

printf("Enter the value of L,R,C\n");

scanf("%f %f %f",&L,&R,&C);

a={ (1/L*C) – (R*R/4*C*C) };

F=sqrt(a);

Printf(“%f”,F);

getch();

}

EXERCISE NO.3.11: Write program to read a four digit integer and print the sum of its digit. Hints: Use / and % operators.

SOLUTION:

#include

void main()

{

int num,a,b,c,d,x,y,result;

clrscr();

printf("Enter a number");

scanf("%d",&num);

a=num%10;

x=num/10;

b=x%10;

y=x/10;

c=y%10;

d=y/10;

result=a+b+c+d;

printf("%d",result);

getch();

}

EXERCISE NO. 3.12: Write a program to print the size of various data types in C.

SOLUTION:

#include

void main()

{

int m;

clrscr();

m=sizeof(10);

printf("Size=%d",m);

getch();

}

EXERCISE NO.3.13: Given three values, write a program to read three values from keyboard and print out the largest of them without using if statement.

SOLUTION:

#include

void main()

{

int x,y,z,a,b;

printf("Enter the value of x,y,z\n");

scanf("%d%d%d",&x,&y,&z);

printf("largest\n");

a=(x>y)?x:y

b=(a>z)?a:z

printf("%d",b);

}

EXERCISE NO.3.14: Write a program to read two integer values m and n and to decide and print whether m is multiple of n.

SOLUTION:

#include

void main()

{

int m,n;

printf("Enter m & n,m>=n:");

scanf("%d %d",&m,&n);

if(m%n==0)

printf("m is a multiple of n");

else

printf("m is not a multiple of n");

getch();

}

EXERCISE N0.3.15: Write a program to read three values using scanf statement and print the following results:

(a)Sum of the values

(b) Average of the three values

(d) Smallest of the three.

SOLUTION:

#include

void main()

{

int a,b,c,x,y;

float sum, average;

clrscr();

printf("Enter the value of a,b,c\n");

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

sum=(a+b+c);

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

{

average=sum/3;

printf("average=%f\n",average);

}

{

printf("Largest\n");

x=(a>b)?a:b;

y=(x>c)?x:c;

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

}

{

printf("Smallest\n");

x=(a

y=(x

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

}

getch();

}

EXERCISE NO.3.16: The cost of one type of mobile service is Rs.250 plus Rs.1.25 for each call made over and above 100 calls. Write a program to read customer codes and calls made and print the bill for each customer.

SOLUTION:

#include

void main()

{

int code,call;

float bill;

clrscr();

printf("Enter customer code and number of calls made:");

scanf("%d %d",&code,&call);

bill=250+(call*1.25);

printf("Bill=%f",bill);

getch();

}

EXERCISE NO.3.17: Write a program to print a table of sin and cos functions for the interval 0 180 degrees in increments of 15 as shown below.

-----------------------------------------------------------------------------------------------x(degees) sin(x) cos(x)

O ……. …….

15 .…… …….

….. ……. …….

SOLUTION:

#include

#define p1 3.1416

#define MAX 180

void main()

{

int i;

float x,y,z;

clrscr();

i=0;

printf("x(degree) sin(x) cos(x)\n");

while(i<=MAX)

{

x=(p1/MAX)*i;

y=sin(x);

z=cos(x);

printf("%d\n %f\n %f\n",i,y,z);

i=i+15;

}

getch();

}

EXERCISE NO.3.18: Write a program to compute the values of square-roots and squares of the number 0 to 100 in steps 10 print the output in a tabular form as shown below.

-----------------------------------------------------------------------------------------------number Square-root square

0 0 0

100 10 10000

SOLUTION:

#include

void main()

{

/*......square root and square of numbers 0 to 100.....*/

int i,y;

float x;

clrscr();

printf("Number\tSquare root\tSquare\n\n");

for(i=0;i<=100;i++)

{

x=sqrt(i);

y=i*i;

printf("%d\t%f\t%d\n",i,x,y);

}

getch();

}

EXERCISE NO.3.19: Write a program that determines whether a given integer is odd or even and displays the number and description on the same line.

SOLUTION:

#include

void main()

{

int x;

clrscr();

printf("Enter the integer number:");

scanf("%d",&x);

if(x%2==0)

printf("THe number %d is even",x);

else

printf("The number %d is odd",x);

getch();

}

EXERCISE NO.3.20: Write a program to illustrate the use of cast operator in a real life situation.

SOLUTION:

include

#include

void main()

{

float sum;

int n;

clrscr();

sum=0;

for(n=1;n<=10;++n)

{

sum=sum+1/(float)n;

printf("%2d %6.4f\n",n,sum);

}

getch();

}

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Sunday, 8 May 2011

SOLUTION- CHAPTER-03: ( Operators and Expression) from PROGRAMMING IN ANSI C: E BALA GURUSHAMY

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