Write a C program to display a triangle of digits as follows. Number of rows is entered by keyboard
1
2 2
3 3
3
4 4
4 4
5 5
5 5 5
6 6
6 6 6 6
#include<stdio.h>
int main()
{
int i,
j,
n;
printf("Enter the number of line:
"); |
Any year is input through the keyboard. Write a program to determine whether the year is a leap year or not.
#include<stdio.h>
int main()
{
Int Y;
printf(
"Enter
a year: " );
scanf(
"%d"
,&Y);
if(Y%4==0
&& Y%100!=0)
printf( "\nLeap Year"
);
else
if(Y%400==0)
printf( "\nLeap Year"
);
else
printf( "\nNot Leap Year"
);
return 0;
}
|
If cost price and selling price of an item is input through the keyboard, write a program to determine whether the seller has made profit or incurred loss. Also determine how much profit he made or loss he incurred.
#include<stdio.h>
int main()
{
float
C,
S;
printf("Enter
cost price of the product: ");
scanf( "%f" ,&C);
printf("\nEnter
selling price of thr products: ");
scanf("%f",&S);
if(S>C)
printf("\nSeller
has made profit.\nProfit= %.3f",S-C);
else
printf("\nSeller
has incurred loss.\nLose= %.3f",C-S);
return 0;
}
|
Write a program to calculate following series 1 + 1/2 + 1/3 + 1/4 + 1/5 +…………….1/n for any number n
#include<stdio.h>
int main()
{
int
n,
k;
float sum=0;
printf("Enter the value of n: ");
scanf("%d",&n);
for(k=1;k<=n;k++)
sum=
sum +
(float)1/k;
printf("\nSum= %f",sum);
return
0;
}
|
Write a program to convert seconds to hours minutes and seconds
#include<stdio.h>
int main()
{
int
S, h, m, s;
printf(
"Second:
" );
scanf(
"%d"
, &S);
h=S/3600;
S=S%3600;
m=S/60;
s=S%60;
printf("\nhh:mm:ss\n%d:%d:%d",
h,
m, s);
return
0;
}
|
Write a c program to calculate the distance between two points using formula √ (( y2− y1)² +( x2− x1)²)
#include<stdio.h>
#include<math.h>
int
main
()
{
int x1,
x2, y1, y2;
float r;
printf( "Enter Point (x1,y1): " );
scanf( "%d"
,&x1);
scanf( "%d"
,&y1);
printf( "\nEnter Point (x2,y2):
"
);
scanf( "%d%d"
,&x2,&y2);
r = sqrt(pow((y2-y1),2)
+ pow((x2-x1),2));
printf( "\nDistance= %f"
,r);
return 0;
}
|
Write a program to evaluate the expression X4+X3+10X for any number X
#include<stdio.h>
#include<math.h>
int main()
{
float
x,
N;
printf(
"Enter
a value for X: "
);
scanf(
"%f"
,&x);
N=pow(x,4)
+ pow(x,3)
+ 10*x;
printf(
"%.2f"
, N);
return
0;
}
|
Write a c program to convert the given temperature Fahrenheit to Celsius using the following formula C = (F – 32)/1.8 and display the values in tabular form
#include<stdio.h>
int
main()
{
float
c,
f;
printf( "F=
" );
scanf( "%f"
,&f);
c=(f-32)/1.8;
printf( "C=
%f" ,c);
return
0;
}
|
Write a program that will read a string from the user and print the number of alphabet on that string.
#include<stdio.h>
#include<conio.h>
int main()
{
char s[100];
printf(
"Enter
your string: " );
gets(s);
printf( "\nThe number of alphabet in the
string is : %d" , strlen(s));
return
0;
}
|
Write a c program that will accept n numbers from user and find their sum and average
#include<stdio.h>
int main()
{
int n,
i, sum=0, ava=0;
printf( "Enter a positive integer number:
" );
scanf( "%d"
, &n);
for(i=1;i<=n;i++)
sum= sum+i;
ava=sum/(i-1);
printf( "\nSum is: %d\nAverage is: %d"
, sum, ava);
return
0;
}
|
Write a program to sum of digits of a given number. e.g. If the input is 158 then output will be 14.
#include<stdio.h>
int main()
{
int n,
a, sum=0;
printf( "Enter a integer number: "
);
scanf( "%d" ,
&n);
while(n%10!=0)
{
a=n%10;
n=n/10;
sum=sum+a;
}
printf( "\nSum of the digit: %d" ,
sum);
return
0;
}
|
Write a program to reverse a number. e.g.: if the is 876 then output will be 678
|
#include<stdio.h> int main()
{
Int
n,
r, temp;
printf( "Enter
an integer number: " );
scanf( "%d" ,
&n);
temp=n;
r=0;
while(n>0)
{
r=r*10 + n%10;
n=n/10;
}
printf( "\nReverse
of %d = %d" , temp, r);
return
0; } |
Write a program to convert number into word. e.g. If input is 953 then output will be Nine Five Three
|
#include<stdio.h> #include<math.h> int main() { Int a, n, r, k, temp; printf( "Enter an integer number: " ); scanf( "%d" ,&n); temp=n; r=0; while(n>0) { r=r*10 + n%10; n=n/10; } while(temp>0) { a=r%10; r=r/10; temp=temp/10; switch (a) { case 1: printf( "One " ); break; case 2: printf( "Tow " ); break; case 3: printf( "Three " ); break; case 4: printf( "Four " ); break; case 5: printf( "Five " ); break; case 6: printf( "Six " ); break; case 7: printf( "Seven " ); break; case 8: printf( "Eight " ); break; case 9: printf( "Nine " ); break; default : printf( "Zero " ); } } return 0; } |
Any number is input through the keyboard. Write a program to determine whether the number is a prime or not.
#include<stdio.h>
#include<math.h>
int main()
{
int i,
n, isprime;
printf( "Enter a positive integer number:
" );
scanf( "%d"
,&n);
if(n<2)
isprime=0;
else
for(i=2;i<sqrt(n);i++)
{
isprime=1;
if(n%i==0)
{
isprime=0;
break;
}
}
if(isprime==1)
printf( "\nPRIME
NUMBER" );
else
printf( "\nNOT
PRIME NUMBER" );
return
0;
}
|
Write a C program to display a prime number in between 1 and 100.
|
#include<stdio.h> #include<math.h> int main() { int i, j, isprime; for(i=2;i<=100;i++) { isprime=1; for(j=2;j<=sqrt(i);j++) if(i%j==0) { isprime=0; break ; } if(isprime==1) printf( "%8d" ,i); } return 0; } |
Some Basic Conceptions of C programming Languge
Data
Types:
There are five data
types in C:
character, integer, floating point, double floating point and valueless.
The sizes of these types
are
shown in below,
Type
Bit Width
Range
char
8
0 to
255
int
16
-32768 to 32767
float
32
3.4E-38 to
3.4E+38
double
64
1.7E-308 to 1.7E+308
void
0
valueless
To work with characters
we need
character type variable. So we have to declare a
“char” type variable. Same
case happen to work with integer type value such as 1, 8,-1,-8, 100,
587 etc.
float and double are used to hold real numbers. Real numbers have both
an
integer and a frictional component.
Void has three uses. The
first is
use to declare explicitly a function as no returning no value; the
second is to declare explicitly a function
as having no parameters; the third is to create generic pointers.
Commonly
Used
Conversion Characters for Data Input/Output:
Character
Meaning
c
data
item is a single character
d
data
item is a decimal integer
f
data item is a floating
point value
s
data item is a string
followed by a whitespace
character
(the null character \0 will
automatically
be
added at the end)
Type
Modifiers:
The basic data type
(excepting
type void) may have various modifiers
preceding
them. The modifier
is
used to alter the meaning of the base type
in various needs. The list of modifiers
:
signed
unsigned
long
short
Declaration
of
variable:
When you are going to
write a
program, you should declare all variables before you use them. General
form of
declaration is
Data type variable
name;
Example:
int I,
j, k
;
char s,
ch ;
double
balance,
profit ;
unsigned int i
;
There
are three
basic places where variable will be declared: inside function, outside
of all
functions, or in the definition of the function parameters. These
variables are
called local variables, global variables, and formal parameters.
Compiler:
To
compile your
program you will need compiler. There are many c compiler, so you can
chose any
of them. But at the beginning Tc or code::blocks will
be useful. So I will tell you to collect
one of them.
I have
used
code::blocks to describe following program in this blog. If you use Tc
you can
use
#inlude<conio.h>
clrscr();
getch();
If you
don’t use
getch (), you will need to press ctrl+F5 to run your program otherwise
ctrl+F9.
To check error press F9. Remember: before you run your program save it
in a
hard drive to avoid loss you written code for any confliction during
run. If
you want to use getch(), write it before last curls-bracket in
the main function. You can use void in
main function, if you do it, no need to return value to main function.
But try
to avoid it’s use. If you don’t use any data type
before main, it will act as a
int. So function will return a value. Okay you can understand all that
I
discussed when you do some practice.
Input
and Output Library Function:
Input
Header File
scanf
stdio.h
fscanf
stdio.h
cscanf
conio.h
sscanf
stdio.h
gets
string.h
Output
Header File
printf
stdio.h
fprintf
stdio.h
cprintf
conio.h
sprintf
stdio.h
puts
string.h
There
are more
input output library function. We will work with some of them. At the
beginning
we will take input from standard I/O devices using scanf and write
output using
printf function.
Some
Examples:
/***************
printf function ***************/
#include<stdio.h>
int main( ) { printf("C Programming Language"); return 0; }
/************** scanf
function ***************/
#include<stdio.h>
int main( ) { int x; printf("Enter a value: "); scanf("%d", &x); // %d will take input a decimal value from I/O devices printf("\nGiven value is: %d", x); // here %d will write a decimal value from x return 0; }
/*************** Variable
within constant value *****************/
#include<stdio.h>
int main( ) { int a=100; printf("%d", a); return 0; }
/***************
Single character input ****************/
#include<stdio.h>
int main() { char ch; printf("Enter a character: "); scanf("%c",&ch); printf("\nGiven character is: %c",ch); return 0; } |