Some C Programs for Electrical Engineeirng Third Semester Students
{
printf(“big=%d”,
a);
{
printf(“big=%d”, b);
1 2
3 4
1 5
#include<stdio.h>
main( )
{
int
mark;
char
grade;
scanf
(“%d %c”, &mark, &grade);
if
(grade= =’A’)
{
mark=mark+10;
}
printf(“%d”,
mark);
}
#include<stdio.h>
main (
)
{
int
mark;
scanf(“%d”,
&mark);
if
(mark>40)
printf(“pass”);
else
printf(“fail”);
}
Write a program to find the sum of two numbers using
function with no arguments and no return values.
#include<stdio.h>
main( )
{
sum
( );
}
sum( )
{
int
i, j, x;
scanf(“%d
%d”, &i, &j);
x=i+j;
printf(“sum=%d”,
x);
return;
}
#include<stdio.h>
main (
)
{
int
day;
printf(“Give
a number between 1 and 7\n”);
scanf(“%d”,
&day);
if
(day = = 1)
printf(“Monday
\n”);
else
if (day = =2)
printf(“Tuesday
\n”);
else
if (day = =3)
printf(“Wednesday
\n”);
else if (day = =4)
printf(“Thursday
\n”);
else if (day = =5)
printf(“Friday
\n”);
else if (day = =6)
printf(“Saturday
\n”);
else
printf(“Sunday
\n”);
}
Write a program
to find the square of n numbers using function with arguments
and no return
values.
#include<stdio.h>
main(
)
{
int
i, n;
printf(“Enter
the value of n \n”);
scanf(“%d,
&n);
for(i=0;
i<n, i++)
square(i);
}
square (m);
int m;
{
int temp;
temp - m * m;
printf(“%d %d, m,
temp);
return;
}
#incude<stdio.h>
main (
)
{
int
a, b, c;
printf(“Enter
three numbers”);
scanf(“%d %d
%d”, &a, &b, &c);
if
(a>b)
{
if
(a>c)
|
printf(“big=%d”,
a);
else
printf(“big=%d”, c);}
else
{
if(b>c)
|
printf(“big=%d”, b);
else
printf(“big=%d”, c);
}
}
#include<stdio.h>
main ( )
{
int
day;
print(“Enter
a number between 1 and 7\n”)
scanf(“%d”,
&day);
switch (day)
{
case
1:
printf
(“Monday \n”);
break;
case 2:
printf
(“Tuesday \n”);
break;
case 3:
printf
(“Wednesday \n”);
break;
case 4:
printf
(“Thursday \n”);
break;
case 5:
printf
(“Friday \n”);
break;
case 6:
printf
(“Saturday \n”);
break;
case 7:
printf
(“Sunday \n”);
break;
default:
printf
(“Enter a correct number \n”);
break;
}
}
Simple and compound interest calculation
Simple
interest = ptr/100
Compound
interest = p(l+r/100)n - p
p
- principle amount
t
- number of years
r
- rate of interest
#include<stdio.h>
#include<math.h>
main( )
{
float p, n,
r, simple, compound;
printf(“Enter
principal amount\n”);
scanf(“%f”,
&p);
printf(“Enter
the rate of interest \n”);
scanf(“%f”,
&r);
printf(“Enter the time period in years\n”);
scanf(“%f”,
&t);
simple = p
* n * r / 100;
compound =
p * pow (l + r/100, t) - p;
printf(“simple
interest is\n\n%6.2f”, simple);
printf(“\n”);
printf(“\n compound
interest is\n\n%6.2f”, compound);
}
Write a C program to calculate the area of the
triangle, given its three sides
Area
= s(s-a)(s-b)(s-c)
s
= (a+b+c) / 2
#include<stdio.h>
#include<math.h>
void main ( )
{
float
a, b, c, s, area;
printf(“\n
Enter three sides a, b, c”);
scanf(“%f %f %f” &a, &b, &c);
s
= (a+b+c)/2;
area=sqrt
(s * (s-a) * (s-b) * (s-c));
printf(“\n
Area of triangle is %6.2f”, area);
}
Write a C program to convert temperature in centrigrade to
fahrenheit and vice
versa.
c to f
= 1.8 x centrigrade + 32
f to c
= (fahrenheit - 32) / 1.8
#include<stdio.h>
#include<math.h>
main( )
{
float c, f, ic, fi;
printf(“Enter temperature in centrigrade
\t”);
scanf(“%f”, &c);
f = 1.8 *c+32;
printf(“Fahrenheit = %f”, f);
printf(“\n Enter the temperature in fahrenheit
\t”);
scanf(“%f”, &fi);
ic = (fi - 32) / 1.8;
printf(“Centigrade = %f”, ic);
}
Write a C program to solve the quadratic equation.
#include<stdio.h>
#include<math.h>
main( )
{
float
a, b, c, d, root, root1, root2;
printft(“Enter
the values of a, b and c\n”);
scanf(%f%f%f”,
&a, &b, &c);
d
= b * b - 4.0 * a *c;
if
(d<0)
printf(“ROOTS
ARE IMAGINARY\t”);
else
if ( d = = 0)
{
printf(“ROOTS
ARE REAL AND EQUAL \n”);
root
= -b / (2.0 * a);
printf(“THE
ROOTS ARE\n root1=root2-%7.3f”, root);
}
else
{
printf(“ROOTS
ARE REAL\n”);
root
1 = (-b + sqrt(d) ) / (2.0 * a);
root 2 = (-b - sqrt(d) ) / (2.0 * a);
printf(“THE ROOTS ARE \n”);
printf(“root=%7.3f\n
root2=%y.3f”, root1, roots2);
}
}
#include<stdio.h>
main (
)
{
int
i;
i
= 0;
while
(i<5)
{
printf(“GuruNanakDevPolytechnic”);
i++;
}
}
#include<stdio.h>
main( )
{
int
i;
i
=1;
do
{
printf(“God
Loves You”);
}
while (i<5)
}
#include<stdio.h>
main()
{
int i, sum;
sum = 0;
for (i = 1;
i<=100; i++)
{
sum = sum+i;
}
printf(“Sum=%d”, sum);
}
Sum and average of given N numbers
#include<stdio.h>
main( )
{
int
count;
float
value, average, sum;
sum=count=o;
printf(“Enter
values one by one, enter negative value to terminate\n\n”);
scanf(“%f”,
&value);
while<value>0)
{
sum
+= value;
count
++;
scanf(“%f”,
&value);
}
average
= sum / (float) count;
printf(“SUM
IS \n\n %f”, average);
}
To find the factorial of a given number
#include<stdio.h>
main( )
{
int
i,n;
int
fact=1;
scanf(“%d”,&n);
if(n>0)
{
for(i=1;i<=n;i++)
fact*=i;
printf(“Factorial=%d”,fact);
}
else
printf(“Negative number”);
}
Write a program to find the smallest of N numbers.
#include<stdio.h>
main( )
{
int
i,n,a[50],small;
printf(“Give
the value of n”);
scanf(“%d”,
&n);
for(i=0;i<n;i++)
/*i<n
because
scanf(“%d”,&a[i]); array starts from 0th
location */
small=a[0];
for(i=1;i<n;i++)
{
if(a[i]<small)
small=a[i];
}
printf(“/n
small=%d”, small);
}
Write a program to arrange N given numbers in
ascending order.
#include<stdio.h>
main( )
{
int
i,n,a[50],temp;
printf(“Give
the value of n”);
scanf(“%d”,
&n);
for(i=0;i<n;i++)
/*i<n because
array
starts from 0th location */
scanf(“%d”,&a[i]);
for(i=0;i<n-1;i++)
{
for(j=i+1;j<n;j++)
{
if(a[i]>a[j])
{
temp=a[i];
a[i][=a[j];
a[j]=temp;
}
}
printf(“printing the list:\n”);
for(i=0;i<n;i++)
printf(“%d”, a[i]);
}
Write a program to
find the smallest number and its position in a given one
dimensional array.
dimensional array.
#include<stdio.h>
main( )
{
int
i,n,a,small,position;
int a[100];
printf(“Give
the value of n”);
scanf(“%d”, &n);
for(i=0;i<n;i++)
scanf(“%d”,&a[i]);
small=a[0];
position=0;
for(i=1;i<n;i++)
{
if(a[i]<=small)
{
small=a[i];
position=i;
}
printf(“the smallest elements is : %d \n”, small);
printf(“the position is : %d
/n”, position);
}
Write a
program to calculate the mean and standard deviation for 10 numbers.
Formula
 |
Mean = S
 |
SD =
S - S
#include<stdio.h>
#include<math.h>
main( )
{
int
i,n;
float
a[50],mean,sd;
float
sumsq=0.0, sum=0.0;
printf(“Give
the numbers of elments”);
scanf(“%d,
&n);
for(i=0;i<n;i++)
{
scanf(“%d”,&a[i]);
sum+=a[i]; //sum=sum+a[i]
}
mean=sum/float(n);
for(i=0;i<n;i++)
{
sumsq=sumsq+a[i]*a[i];
}
sd=sqrt(sumsq/float(n)-mean*mean);
printf(“Mean
is:%f”/mean);
printf(“Standard deviation is: %f’, sd);
}
Write a program to read a (nxm) matrix. (nxm means n
rows and m colums)
#include<stdio.h>
main( )
{
int
a[50][50], i, j, m, n;
printf(“\n
Enter the order of matrix”);
scanf(“%d%d”,
&n, &m);
printf(“\n
Enter the matrix value”);
for
(i=0;i<n;i++)
for
(j=0;j<m;j++)
scanf(“%d”,
&a[i][j]);
}
Write a program to print a (nxm) matrix
#incude<stdio.h>
main( )
{
int
a[50][50], i, j, m, n;
scanf(“%d%d”,
&n, &m);
/*
reading the matrix */
for
(i=0;i<n;i++)
for
(j=0;j<m;j++)
scanf(“%d”,
&a[i] [j]);
/* printing the matrix */
for
(i=0;i<n;i++)
for
(j=0;j<m;j++)
printf(%d”,
a[i][j]);
}
Write a program to reverse a string
#include<stdio.h>
main( )
{
char
s1[10], s2[10];
int
1=0, i;
while(s1[ù] !=
‘\0’)
ù++;
for
(i=0; i<ù; i++)
s2
[ù-i-1] = s1[i];
s2[i] = ‘\0’;
printf(“the reversed string is \n”);
puts(s2); }
Write a program to read a matrix and print its transpose
1 2
3 4
Suppose
A =
5
6 7 8
1 5
2
6
Transpose
of A = 3 7
4 8
/* transpose of a
given matrix */
#incude<stdio.h>
main( )
{
int
a[20][20], i, j;
printf(“\Give
the values of n and m”);
scanf(“%d%d”,
&n, &m);
printf(“\n
Enter the matrix”);
for (i=0;i<n;i++)
for (j=0;j<m;j++)
scanf(“%d”,
&a[i][j]);
for(j=0;j<m;j++
{
for (i=0;i<n;i++)
printf(“%5d”,
a[i][j]);
printf(“\n”);
}
}
Write a program to print all the diagonal elements in a two
dimensional array
a[20][20].
a[20][20].
The diagonal elements
are a[0][0], a[1][1], a[2][2] etc.
/* program to print
diagonal elements */
#incude<stdio.h>
main( )
{
int
a[20][20], i, j;
for (i=0;i<20;i++)
for (j=0;j<20;j++)
scanf(“%d”,
&a[i][j]);
for (i=0;i<20;i++)
printf(“%5d”,
a[i][j]);
}
Write
a program to find the sum of the diagonal elements of a given 20x20
matrix.
matrix.
/*
program to add the diagonal elements */
#incude<stdio.h>
main( )
{
int
a[20][20], i, j;
int
sum=0;
for (i=0;i<20;i++)
for (j=0;j<20;j++)
scanf(“%d”, &a[i][j]);
for (i=0;i<20;i++)
sum=sum+a[i][i];
/* sum+=a[i][i];*/
printf(“sum of the diagonal=%d”,sum);
}
Write a program to sum all the elements of
nxm matrix sum = a[0][0] + a[0][1]
+ a[0][2] + .......+ a[1][0] + a[1][1] + a[1][2] + ......
+ a[0][2] + .......+ a[1][0] + a[1][1] + a[1][2] + ......
#incude<stdio.h>
main( )
{
int
a[20][20], n, m, i, j;
int
sum = 0;
printf(“\Give
the values of n and m”);
scanf(“%d%d”,
&n, &m);
for
(i=0;i<n;i++)
for
(j=0;j<n;j++)
scanf(“%d”,
&a[i][j]);
for
(i=0;i<n;i++)
for(j=0;j<m;j++
sum=sum+a[i][j];
printf(“Sum of the elements = %d”, sum)
}
Write a program to find the length of the given string
#include<stdio.h>
main( )
{
int ù = 0;
char a[20];
printf(“Give the
string”);
gets(a);
while(a[ù]!=’\0’)
ù ++;
printf(“the length of
the give string:%d \n”, ù
);
}
/* program to add two matrices*/
#include<stdio.h>
main( )
{
int
a[10] [10], int b[10] [10], int c[10] [10];
int
i, j, n, m, p, q;
printf(“give
the row and column of A matrix \n”);
scanf(“%d%d”,
&n,&m);
printf(“give
the row and column of B matrix \n”);
scanf(“%d%d”,
&p,&q);
/
*checking the order of the matrix */
if(n=
=p)&&(m = = q)
{
printf(“matrices
can be added \n”);
for (i=0; i<n; i++)
for
(j=0; j<m; j++)
scanf(“%d”,
&a[i][j]);
for
(i=0; i<q; i++)
for
(j=0; j<p; j++)
scanf(“%d”,
&b[i][j]);
for
(i=0; i<n; i++)
for
(j=0; j<m; j++)
c[i][j]
= a[i][j] + b[i][j];
for
(i=0;i<n;i++)
{
for
(j=0;i<m;j++)
printf(‘%d”,
c[i][j]);
printf(“\n”);
}
}
else
printf(“matrixs cannot be added \n”);
}
Write a program to find out the largest and smallest
number in a given matrix.
/*
program to find the largest and smallest */
#include<stdio.h>
main( )
{
int
a[10] [10], i, j, small, large;
printf(“give
the values of n and m \n”);
scanf(“%d%d”,
&n,&m);
for
(i=0; i<n; i++)
for (j=0;j<m;j++)
scanf(“%d”,
&a[i][j]);
small=a[0][0];
for (i=0;i<n;i++)
for(j=0;j<m;j++)
if(small>a[i][j])
small=
a[i][j]
large= a[0][0];
for (i=0;i<n;i++)
for(j=0;j<m;j++)
if(large<a[i][j])
large=a[i][j];
printf(“smallest
number is %d\t”, small);
printf(“largest
number is %d\t”, large);
}
/* program to multiply two matrices*/
#include<stdio.h>
main( )
{
int
a[10] [10], b[10] [10], [10] [10];
int i, j, n, m, p, q;
printf(“give the row and column of matrix
A\n”);
scanf(“%d%d”,
&n,&m);
printf(“give the row and column of matrix
B\n”);
scanf(“%d%d”,
&p,&q);
if(m=
= p)
{
printf(“Matrices
can be multiplied”);
for
(i=0; i<n; i++)
for (j=0;j<m;j++)
scanf(“%d”,
&a[i][j]);
for (i=0;i<p;i++)
for(j=0;j<q;j++)
scanf(“%d”,
&b[i][j]);
for (i=0;i<n;i++)
for(j=0;j<q;j++)
{
c[i][j]=0
for
(k=0;k<m;k++)
c[i][j]=c[i][j])+a[i][k]*
b[k][j];
}
for(i=0;i<n;j++)
{
for
(j=0;j<q;j++)
printf(“%5d”, c[i][j]);
printf(“\n”);
}
}
else
printf(“The
matrices cannot be multiplied\n”);
}
- # include <stdio.h>
- # include <conio.h>
- void main()
- {
- int x, n, count = 1, pow = 1 ;
- clrscr() ;
- printf("Enter the value of x : ") ;
- scanf("%d", &x) ;
- printf("\nEnter the value of n : ") ;
- scanf("%d", &n) ;
- while(count <= n)
- {
- pow = pow * x ;
- count ++ ;
- }
- printf("\nThe power of %d^%d is : %d", x, n, pow) ;
- getch() ;
- }
Write a C program to calculate pow(x,n)
21. Below
solution divides the problem into subproblems of size y/2 and call the
subproblems recursively.
#include<stdio.h>
/* Function to calculate x raised to the
power y */
int power(int x, unsigned int y)
{
if( y == 0)
return 1;
else if (y%2 == 0)
return power(x, y/2)*power(x, y/2);
else
return x*power(x, y/2)*power(x, y/2);
}
/* Program to test function power */
int main()
{
int x = 2;
unsigned int y = 3;
printf("%d",
power(x, y));
getchar();
return 0;
}
|
22. Time
Complexity: O(n)
Space Complexity: O(1)
Algorithmic Paradigm: Divide and conquer.
Space Complexity: O(1)
Algorithmic Paradigm: Divide and conquer.
23. Above
function can be optimized to O(logn) by calculating power(x, y/2) only once and
storing it.
/* Function to calculate x raised to the
power y in O(logn)*/
int power(int x, unsigned int y)
{
int temp;
if( y == 0)
return 1;
temp = power(x,
y/2);
if (y%2 == 0)
return temp*temp;
else
return x*temp*temp;
}
|
Time Complexity of optimized solution: O(logn)
Let us extend the pow function to work for negative y and float x.
Let us extend the pow function to work for negative y and float x.
/* Program to test function power */
#include<stdio.h>
#include<math.h>
int main()
{
double x=2;
double y=3;
double p;
p=(pow(x,y));
printf("%f",p);
getchar();
}
|
#include<stdio.h>
void
main()
{
int sum,n;
fact x,y;
printf("Enter the exponential(E)
value");
scanf("%f ",y);
printf("Enter the value for x");
scanf("%f",x);
printf("No. of times x is to be
multiplied");
scanf("%d",n);
while(e=n)
{
sum=x^n;
printf("The result of expression is
=%d",sum);
printf("Check this out%d");
}
}
|
||||||
Re: Program to find the value of e raised to power x using
while loop
|
||||||
#include<stdio.h>
void
main()
{
int i=1,e,x,s,p=1;
printf("Enter e and x :");
scanf("%d%d",&e,&x);
while(i<=x)
{
p=p*e;
i++;
}
printf("power is %d ",p);
}
here pow(e,x)
is calculated using this program.
|
1
|
|||||
Re: Program to find the value of e raised to power x using
while loop
|
||||||
#include<stdio.h>
#include<math.h>
main()
{
int
i,j,n,x,fact=1;
float
c,t,sum=1;
printf("enter
the value of x and n);
scanf("%d%d",&x,&n);
while(i<n-1)
{
c=pow(x,i);
for(j=1;j<i;j++)
fact=fact*j;
t=c/fact;
sum=sum+t;
}i=i+1;
printf("the
sum of series is %f",sum);
getch();
}
|
||||||
Re: Program to find the value
of e raised to power x using while loop
|
||||||
include<stdio.h>
#include<math.h>
main()
{
int
i=1,e,x,c;
printf("enter
the value of x and e);
scanf("%d%d",&x,&e);
while(i<=e)
{
c=pow(x,e);
i=i+1;
}
printf("the
sum of series is %f",c);
getch();
}
|
||||||
Re: Program to find the value of e raised to power x using
while loop
|
||||||
#include<stdio.h>
#include<conio.h>
#define
e 2.718281828
int
main()
{
double ex=e;
int x,i=0;
printf("\nenter the power : ");
scanf("%d",&x);
while(i++!=x-1)
{
ex*=e;
}
printf("\nthe result is :
%f",ex);
getch();
return 0;
}
/*i
hope u get the logic.....TR dash*/
note:--->run
in dev C++ / TC
|
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