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.
#include<stdio.h>
#include<conio.h>
void main()
{
int x,y,z,dummy;
clrscr();
printf("Enter values of x,y and z:");
scanf("%d%d%d",&x,&y,&z);
dummy=x;
x=y;
y=z;
z=dummy;
printf("x=%d\ny=%d\nz=%d\n",x,y,z);
getch();
}
3.2) Write a program that reads a floating-point number and then displays the right-most digit of the integral part of the number.
#include<stdio.h>
#include<conio.h>
void main()
{
float num;
int i,last;
clrscr();
printf("Enter a floating point number:");
scanf("%f",&num);
i=num;
while(i>0)
{
last=i%10;
break;
}
printf("%d\n",last);
getch();
}
3.3) Modify the above program to display the two right-most digits of the integral part of the number.
#include<stdio.h>
#include<conio.h>
void main()
{
int num,slast,i;
clrscr();
printf("Enter an integral number:");
scanf("%d",&num);
i=num;
while(i>0)
{
slast=i%100;
break;
}
printf("%d\n",slast);
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.
#include<stdio.h>
#include<conio.h>
void main()
{
int length,width,area,per;
clrscr();
printf("Enter length and width of rectangle:");
scanf("%d%d",&length,&width);
per=2*(length+width);
area=length*width;
printf("Perimeter=%d\n",per);
printf("Area=%d\n",area);
getch();
}
3.5) Given an integer number,write a program that displays the numbers 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
7 8
8
#include<stdio.h>
#include<conio.h>
void main()
{
int num,i,a,b,c;
clrscr();
printf("Enter a four digit number:");
scanf("%d",&num);
a=num%1000;
b=a%100;
c=b%10;
printf("%d\n%d\n%d\n%d\n",num,a,b,c);
getch();
}
3.6) The straight line method of computing the yearly depreciation of the value of an item is given by:
Depreciation = Purchase Price - Salvage Value
Years of Service
Write a program to determine the salvage value of an item when the purchase price,years of service, and the annual depreciation are given.
#include<stdio.h>
#include<conio.h>
void main()
{
int dep,sal,pur,year;
clrscr();
printf("Enter purchase price of item:"):
scanf("%d",&pur);
printf("Enter years of service:");
scanf("%d",&year);
printf("Enter annula depreciation:");
scanf("%d",&dep);
sal=pur - (dep*year);
printf("Salvage Value=%d\n",sal);
getch();
}
3.7) Write a program that will read a real number from the keyboard and print the following output in one line:
Smalllest integer The given Largest integer
not less than number not greater than
the number the number
#include<stdio.h>
#include<conio.h>
void main()
{
float m;
int n,p;
clrscr();
printf("Enter the value of m:");
scanf("%f",&m);
n=(m/1)+1;
p=m;
printf("%d%f%d",n,m,p);
getch();
}
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(metres per second),a is the acceleration(metres per second2).Write a program to evaluate the distance travelled at regular intervals of time,given the values of u and a.The program should provide the flexibility to the user to select his own time intervals and repeat the calculations the different values of u and a.
#include<stdio.h>
#include<conio.h>
void main()
{
float u,d,a,t;
clrscr();
printf("Enter initial velocity:");
scanf("%f",&u);
printf("Enter acceleration:");
scanf("%f",&a);
printf("Enter time taken in seconds:");
scanf("%f",&t);
d=(u*t) + (a*t*t)/2;
printf("Distance Travelled=%f\n",d);
getch();
}
3.9) In inventory management,the Economic Order Quantity for a single item is given by:
EOQ=sqrt[(2 x demand rate x setup costs)/(holding cost per item per unit time)]
And the optimal Time Between Orders
TBO=sqrt[(2 x setup costs)/(demand rate x holding cost per unit time)]
Write a program to compute EOQ and TBO,given demand rate(items per unit time),setup costs(per order),and the holding cost(per item per unit time).
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int drate,scost,hcost;
float eoq,tbo,xeoq,xtbo;
clrscr();
printf("Enter Demand Rate:");
scanf("%d",&drate);
printf("Enter setup cost:");
scanf("%d",&scost);
printf("Enter holding cost:");
scanf("%d",&hcost);
xeoq=(float)(2*drate*scost)/(hcost);
eoq=sqrt(xeoq);
xtbo=(float)(2*scost)/(drate*hcost);
tbo=sqrt(xtbo);
printf("Economic Order Quality=%f\n",eoq);
printf("Optimal Time Between Orders=%f\n",tbo);
getch();
}
3.10) For a certain electrical circuit with an inductance L and resistance R,the damped natural frequency is given by:
Frequency=sqrt[(1/LC) - (R2/4C2)]
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.
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
float L,R,freq,i,xfreq;
clrscr();
printf("Enter Inductance L:");
scanf("%f",&L);
printf("Enter Resistance R:");
scanf("%f",&R);
for(i=0;i<=0.1;i+=0.01)
{
xfreq=1/(L*i) - (R*R)/(4*i*i);
freq=sqrt(xfreq);
printf("Frequency=%f\n",freq);
}
getch();
}
3.11) Write a program to read a four digit integer and print the sum if its digits.
HINT : Use / and % operators.
#include<stdio.h>
#include<conio.h>
void main()
{
int no,last,sum=0;
clrscr();
printf("Enter a 4-digit number:");
scanf("%d",&no);
while(no!=0)
{
last=no%10;
sum=sum+last;
no=no/10;
}
printf("Sum=%d\n",sum);
getch();
}
3.12) Write a program to print the size of various data types in C.
#include<stdio.h>
#include<conio.h>
void main()
{
int size,no;
clrscr();
printf("Enter number:");
scanf("%d",&no);
size=sizeof(no);
printf("Size=%d\n",size);
getch();
}
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.
#include<stdio.h>
#include<conio.h>
void main()
{
int x,y,z,a,b;
clrscr();
printf("Enter the value of x,y,z:");
scanf("%d%d%d",&x,&y,&z);
a=(x>y)?x:y;
b=(a>z)?a:z;
printf("%d",b);
getch();
}
3.14) Write a program to read two integer values of m and n and to decide and print whether m is a multiple of n.
#include<stdio.h>
#include<conio.h>
void main()
{
int m,n;
clrscr();
printf("Enter m and n:");
scanf("%d%d",&m,&n);
if(m%n==0)
{
printf("m is a multiple of n\n");
}
else
{
printf("m is not a multiple of n\n");
}
getch();
}
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
(c)Largest of the three
(d)Smallest of the three
#include<stdio.h>
#include<conio.h>
void main()
{
int no1,no2,no3,sum,a,b;
clrscr();
printf("Enter no1,no2 and no3:");
scanf("%d%d%d",&no1,&no2,&no3);
sum=no1+no2+no3;
avg=(float)(no1+no2+no3)/3;
printf("Sum=%d\n",sum);
printf("Average=%f\n",avg);
a=(no1<no2)?no1:no2;
b=(a<no3)?a:no3;
printf("Smallest of three=%d\n",b);
getch();
}
3.16) The cost of one type of mobile service is Rs. 250 plus Rs. 1.25 fro 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.
#include<stdio.h>
#include<conio.h>
void main()
{
int code,calls,amt,x=1.25;
clrscr();
printf("Enter code:");
scanf("%d",&code);
printf("Enter calls made:");
scanf("%d",&calls);
if(calls>100)
{
amt=250 + (calls*x);
}
else
{
amt=250;
}
printf("Customer Code Calls Made Total Amount\n");
printf("%d %d %d\n",code,calls,amt);
getch();
}
3.17) Write a program to print a table of sin and cos functions for the interval from 0 to 180 degrees in increments of 15 as shown below.
#include<stdio.h>
#include<conio.h>
#include<math.h>
#define pi 3.14
#define max 180
void main()
{
int i;
float sine,cosine,x;
clrscr();
for(i=0;i<=max;i+=15)
{
x=(float)(pi/max)*i;
sine=sin(x);
cosine=cos(x);
printf("%d\t%f\t%f\n",i,sine,cosine);
}
getch();
}
3.18) Write a program to compute the values of square-roots and squares of the numbers 0 to 100 in steps and print the output in a tabular form.
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,sqr;
float sqroot;
clrscr();
printf("Number\tSquare-root\tSquare\n");
for(i=0;i<=100;i+=10)
{
sqroot=sqrt( (float) (i) );
sqr=i*i;
printf("%d\t%f\t%d\n",i,sqroot,sqr);
}
getch();
}
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.
#include<stdio.h>
#include<conio.h>
void main()
{
int no;
clrscr();
printf("Enter number:");
scanf("%d",&no);
if(no%2==0)
{
printf("%d is even\n",no);
}
else
{
printf("%d is odd\n",no);
}
getch();
}
#include<stdio.h>
#include<conio.h>
void main()
{
int x,y,z,dummy;
clrscr();
printf("Enter values of x,y and z:");
scanf("%d%d%d",&x,&y,&z);
dummy=x;
x=y;
y=z;
z=dummy;
printf("x=%d\ny=%d\nz=%d\n",x,y,z);
getch();
}
3.2) Write a program that reads a floating-point number and then displays the right-most digit of the integral part of the number.
#include<stdio.h>
#include<conio.h>
void main()
{
float num;
int i,last;
clrscr();
printf("Enter a floating point number:");
scanf("%f",&num);
i=num;
while(i>0)
{
last=i%10;
break;
}
printf("%d\n",last);
getch();
}
3.3) Modify the above program to display the two right-most digits of the integral part of the number.
#include<stdio.h>
#include<conio.h>
void main()
{
int num,slast,i;
clrscr();
printf("Enter an integral number:");
scanf("%d",&num);
i=num;
while(i>0)
{
slast=i%100;
break;
}
printf("%d\n",slast);
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.
#include<stdio.h>
#include<conio.h>
void main()
{
int length,width,area,per;
clrscr();
printf("Enter length and width of rectangle:");
scanf("%d%d",&length,&width);
per=2*(length+width);
area=length*width;
printf("Perimeter=%d\n",per);
printf("Area=%d\n",area);
getch();
}
3.5) Given an integer number,write a program that displays the numbers 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
7 8
8
#include<stdio.h>
#include<conio.h>
void main()
{
int num,i,a,b,c;
clrscr();
printf("Enter a four digit number:");
scanf("%d",&num);
a=num%1000;
b=a%100;
c=b%10;
printf("%d\n%d\n%d\n%d\n",num,a,b,c);
getch();
}
3.6) The straight line method of computing the yearly depreciation of the value of an item is given by:
Depreciation = Purchase Price - Salvage Value
Years of Service
Write a program to determine the salvage value of an item when the purchase price,years of service, and the annual depreciation are given.
#include<stdio.h>
#include<conio.h>
void main()
{
int dep,sal,pur,year;
clrscr();
printf("Enter purchase price of item:"):
scanf("%d",&pur);
printf("Enter years of service:");
scanf("%d",&year);
printf("Enter annula depreciation:");
scanf("%d",&dep);
sal=pur - (dep*year);
printf("Salvage Value=%d\n",sal);
getch();
}
3.7) Write a program that will read a real number from the keyboard and print the following output in one line:
Smalllest integer The given Largest integer
not less than number not greater than
the number the number
#include<stdio.h>
#include<conio.h>
void main()
{
float m;
int n,p;
clrscr();
printf("Enter the value of m:");
scanf("%f",&m);
n=(m/1)+1;
p=m;
printf("%d%f%d",n,m,p);
getch();
}
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(metres per second),a is the acceleration(metres per second2).Write a program to evaluate the distance travelled at regular intervals of time,given the values of u and a.The program should provide the flexibility to the user to select his own time intervals and repeat the calculations the different values of u and a.
#include<stdio.h>
#include<conio.h>
void main()
{
float u,d,a,t;
clrscr();
printf("Enter initial velocity:");
scanf("%f",&u);
printf("Enter acceleration:");
scanf("%f",&a);
printf("Enter time taken in seconds:");
scanf("%f",&t);
d=(u*t) + (a*t*t)/2;
printf("Distance Travelled=%f\n",d);
getch();
}
3.9) In inventory management,the Economic Order Quantity for a single item is given by:
EOQ=sqrt[(2 x demand rate x setup costs)/(holding cost per item per unit time)]
And the optimal Time Between Orders
TBO=sqrt[(2 x setup costs)/(demand rate x holding cost per unit time)]
Write a program to compute EOQ and TBO,given demand rate(items per unit time),setup costs(per order),and the holding cost(per item per unit time).
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int drate,scost,hcost;
float eoq,tbo,xeoq,xtbo;
clrscr();
printf("Enter Demand Rate:");
scanf("%d",&drate);
printf("Enter setup cost:");
scanf("%d",&scost);
printf("Enter holding cost:");
scanf("%d",&hcost);
xeoq=(float)(2*drate*scost)/(hcost);
eoq=sqrt(xeoq);
xtbo=(float)(2*scost)/(drate*hcost);
tbo=sqrt(xtbo);
printf("Economic Order Quality=%f\n",eoq);
printf("Optimal Time Between Orders=%f\n",tbo);
getch();
}
3.10) For a certain electrical circuit with an inductance L and resistance R,the damped natural frequency is given by:
Frequency=sqrt[(1/LC) - (R2/4C2)]
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.
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
float L,R,freq,i,xfreq;
clrscr();
printf("Enter Inductance L:");
scanf("%f",&L);
printf("Enter Resistance R:");
scanf("%f",&R);
for(i=0;i<=0.1;i+=0.01)
{
xfreq=1/(L*i) - (R*R)/(4*i*i);
freq=sqrt(xfreq);
printf("Frequency=%f\n",freq);
}
getch();
}
3.11) Write a program to read a four digit integer and print the sum if its digits.
HINT : Use / and % operators.
#include<stdio.h>
#include<conio.h>
void main()
{
int no,last,sum=0;
clrscr();
printf("Enter a 4-digit number:");
scanf("%d",&no);
while(no!=0)
{
last=no%10;
sum=sum+last;
no=no/10;
}
printf("Sum=%d\n",sum);
getch();
}
3.12) Write a program to print the size of various data types in C.
#include<stdio.h>
#include<conio.h>
void main()
{
int size,no;
clrscr();
printf("Enter number:");
scanf("%d",&no);
size=sizeof(no);
printf("Size=%d\n",size);
getch();
}
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.
#include<stdio.h>
#include<conio.h>
void main()
{
int x,y,z,a,b;
clrscr();
printf("Enter the value of x,y,z:");
scanf("%d%d%d",&x,&y,&z);
a=(x>y)?x:y;
b=(a>z)?a:z;
printf("%d",b);
getch();
}
3.14) Write a program to read two integer values of m and n and to decide and print whether m is a multiple of n.
#include<stdio.h>
#include<conio.h>
void main()
{
int m,n;
clrscr();
printf("Enter m and n:");
scanf("%d%d",&m,&n);
if(m%n==0)
{
printf("m is a multiple of n\n");
}
else
{
printf("m is not a multiple of n\n");
}
getch();
}
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
(c)Largest of the three
(d)Smallest of the three
#include<stdio.h>
#include<conio.h>
void main()
{
int no1,no2,no3,sum,a,b;
clrscr();
printf("Enter no1,no2 and no3:");
scanf("%d%d%d",&no1,&no2,&no3);
sum=no1+no2+no3;
avg=(float)(no1+no2+no3)/3;
printf("Sum=%d\n",sum);
printf("Average=%f\n",avg);
a=(no1<no2)?no1:no2;
b=(a<no3)?a:no3;
printf("Smallest of three=%d\n",b);
getch();
}
3.16) The cost of one type of mobile service is Rs. 250 plus Rs. 1.25 fro 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.
#include<stdio.h>
#include<conio.h>
void main()
{
int code,calls,amt,x=1.25;
clrscr();
printf("Enter code:");
scanf("%d",&code);
printf("Enter calls made:");
scanf("%d",&calls);
if(calls>100)
{
amt=250 + (calls*x);
}
else
{
amt=250;
}
printf("Customer Code Calls Made Total Amount\n");
printf("%d %d %d\n",code,calls,amt);
getch();
}
3.17) Write a program to print a table of sin and cos functions for the interval from 0 to 180 degrees in increments of 15 as shown below.
#include<stdio.h>
#include<conio.h>
#include<math.h>
#define pi 3.14
#define max 180
void main()
{
int i;
float sine,cosine,x;
clrscr();
for(i=0;i<=max;i+=15)
{
x=(float)(pi/max)*i;
sine=sin(x);
cosine=cos(x);
printf("%d\t%f\t%f\n",i,sine,cosine);
}
getch();
}
3.18) Write a program to compute the values of square-roots and squares of the numbers 0 to 100 in steps and print the output in a tabular form.
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,sqr;
float sqroot;
clrscr();
printf("Number\tSquare-root\tSquare\n");
for(i=0;i<=100;i+=10)
{
sqroot=sqrt( (float) (i) );
sqr=i*i;
printf("%d\t%f\t%d\n",i,sqroot,sqr);
}
getch();
}
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.
#include<stdio.h>
#include<conio.h>
void main()
{
int no;
clrscr();
printf("Enter number:");
scanf("%d",&no);
if(no%2==0)
{
printf("%d is even\n",no);
}
else
{
printf("%d is odd\n",no);
}
getch();
}
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