Programs
: functions with arguments .
#include<stdio.h>
#include<conio.h>
long int factorial(int x); /*
function declaration or prototype*/
/* main function*/
void main()
{
int n;
long int res;
clrscr();
printf("enter
an integer value");
scanf("%d",&n);
res =
factorial(n); /* function call*/
printf("the
factorial of %d is %ld",n,res);
getch();
}
/* function definition*/
long int factorial(int x)
{
int i;
long int fact=1;
for(i=1;i<=x;i++)
{
fact=fact*i;
}
return fact;
}
Programs
: functions with arguments without return value
#include<stdio.h>
#include<conio.h>
/* function definition*/
void factorial(int x)
{
int i;
long int fact=1;
for(i=1;i<=x;i++)
{
fact=fact*i;
}
printf("the
factorial of %d is %ld",x,fact);
}
/* main function*/
void main()
{
int n;
clrscr();
printf("enter
an integer value");
scanf("%d",&n);
factorial(n); /*
function call*/
getch();
}
Programs
: functions without arguments
#include<stdio.h>
#include<conio.h>
/* function definition*/
void factorial()
{
int i,x;
long int fact=1;
printf("enter
an integer value");
scanf("%d",&x);
for(i=1;i<=x;i++)
{
fact=fact*i;
}
printf("the
factorial of %d is %ld",x,fact);
}
/* main function*/
void main()
{
clrscr();
factorial(); /*
function call*/
getch();
}
Programs : Recursive
Functions
#include<stdio.h>
#include<conio.h>
long factorial(int n) /*
function definition*/
{
long fact=1;
if(n<=1)
return 1;
else
{
fact=n*factorial(n-1);
/* recursively calling function itself */
return fact;
}
}
void main()
{
int a;
long x;
clrscr();
printf("enter an integer value :
");
scanf("%d",&a);
x=factorial(a); /*
function call statement from main */
printf("the factorial is
%ld",x);
getch();
}
Programs : Matrix Addition
#include<stdio.h>
#include<conio.h>
void main ()
{
int a[2][2],b[2][2],c[2][2],i,j;
clrscr();
/*
reading values for first matrix */
printf("enter the values for
matrix a");
for(i=0;i<2;i++)
{
for(j=0;j<2;j++)
{
scanf("%d",&a[i][j]);
}
}
/*
reading values for second matrix */
printf("enter the values for
matrix b");
{
for (i=0;i<2;i++)
{
for(j=0;j<2;j++)
{
scanf("%d",&b[i][j]);
}
}
for(i=0;i<2;i++) /* matrix
multiplication process */
{
for(j=0;j<2;j++)
{
c[i][j]=
a[i][k]+b[k][j]; /* Adding corresponding values
*/
}
}
printf("the result of addition
of two matrices\n\n");
for(i=0;i<2;i++) /* printing
resultant matrix row wise */
{
for(j=0;j<2;j++)
{
printf(" %d",c[i][j]);
}
printf("\n");
}
getch();
}
Programs : Matrix Subtraction
#include<stdio.h>
#include<conio.h>
void main ()
{
int a[2][2],b[2][2],c[2][2],i,j;
clrscr();
/*
reading values for first matrix */
printf("enter the values for
matrix a");
for(i=0;i<2;i++)
{
for(j=0;j<2;j++)
{
scanf("%d",&a[i][j]);
}
}
/*
reading values for second matrix */
printf("enter the values for
matrix b");
{
for (i=0;i<2;i++)
{
for(j=0;j<2;j++)
{
scanf("%d",&b[i][j]);
}
}
for(i=0;i<2;i++) /* matrix
subtraction process */
{
for(j=0;j<2;j++)
{
c[i][j]=
a[i][k]-b[k][j]; /* subtracting
corresponding values */
}
}
printf("the result of subtraction
of two matrices\n\n");
for(i=0;i<2;i++) /* printing
resultant matrix row wise */
{
for(j=0;j<2;j++)
{
printf(" %d",c[i][j]);
}
printf("\n");
}
getch();
}
Programs : Matrix
Multiplication
#include<stdio.h>
#include<conio.h>
void main ()
{
int a[2][2],b[2][2],c[2][2],i,j,k;
clrscr();
/*
reading values for first matrix */
printf("enter the values for
matrix a");
for(i=0;i<2;i++)
{
for(j=0;j<2;j++)
{
scanf("%d",&a[i][j]);
}
}
/*
reading values for second matrix */
printf("enter the values for
matrix b");
{
for (i=0;i<2;i++)
{
for(j=0;j<2;j++)
{
scanf("%d",&b[i][j]);
}
}
printf("the result of
multiplication of two matrices\n\n");
for(i=0;i<2;i++) /* matrix
multiplication process */
{
for(j=0;j<2;j++)
{
c[i][j]=0; /*
initializing resultant matrix */
for(k=0;k<2;k++)
{
c[i][j]=c[i][j]+a[i][k]*b[k][j]; /*
multiplying row & column values for a resultant cell value */
}
}
}
for(i=0;i<2;i++) /* printing
resultant matrix row wise */
{
for(j=0;j<2;j++)
{
printf(" %d",c[i][j]);
}
printf("\n");
}
getch();
}
Program : Perfect number
#include<stdio.h>
#include<conio.h>
void main()
{
int x,i,sum=0;
clrscr();
printf("enter a
number");
scanf("%d",&x);
for(i=1;i<x;i++)
{
if(x%i==0)
{
sum=sum+i;
}
}
if(sum==x)
{
printf("perfect
number");
}
else
{
printf("not a
perfect number");
}
getch();
}
Program : Reverse of the digits of a
number
#include<stdio.h>
#include<conio.h>
void main()
{
int n,rem,rev=0;
clrscr();
printf("enter an integer
value: ");
scanf("%d",&n);
while(n>0)
{
rem=n%10;
rev=rev*10+rem;
n=n/10;
}
printf("\n the reverse of the
digits of a number is %d",rev);
getch();
}
Program : Sorting numbers
#include<stdio.h>
#include<conio.h>
void main()
{
int a[10],i,j,temp,n;
clrscr();
printf("enter the
values of n\t");
scanf("%d",
&n);
printf("\n\n enter
%d values \n",n);
for(i=0;i<n; i++)
{
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("\n\n values
after sorting are:\n\n");
for(i=0;i<n;i++)
printf("\t%d",
a[i]);
getch();
}
Program : to find the
largest of an array
#include<stdio.h>
#include<conio.h>
void main()
{
int a[10],i,j,temp,n;
clrscr();
printf("enter the
values of n\t");
scanf("%d",
&n);
printf("\n\n enter
%d values \n",n);
for(i=0;i<n; i++)
{
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("\n Largest
value of array is :%d", a[n-1]);
getch();
}
Program : Structures
struct
personal /* Structure definition */
{
char name[20]
int day;
char
month[10];
int year;
float salary;
};
main()
{
struct personal person; /*
Structure variable declaration */
printf(“Input Values\n”);
/* Reading
data into structure variable elements */
scanf(“%s %d %s %d %f”, person.name,
&person.day, person.month, &person.year, &person.salary);
/*
display data from structure variable elements */
printf(“%s %d %s %d %f\n”,
person.name, person.day, person.month, person.year, person.salary);
}
Output
Input values
M.L.Goel 10 January 1945 4500
M.L.Goel 10 January 1945 4500.00
PROGRAM : SORTING STRINGS:
#include<stdio.h>
#include<string.h>
#include<conio.h>
int main()
{
/*variable declaration */
char str[80],*ptr[5];
int i,j;
clrscr();
/* input strings */
printf("enter 5 strings\n");
for(i=0;i<5;i++)
{
scanf("%s",ptr[i]);
}
/* sorting strings */
for(i=0;i<4;i++)
{
for(j=i+1;j<5;j++)
{
if((strcmp(ptr[i],ptr[j]))>0)
{
strcpy(str,ptr[i]);
strcpy(ptr[i],ptr[j]);
strcpy(ptr[j],str);
}
}
}
/* printing sorted strings */
printf("\n the stored are");
for(i=0;i<5;i++)
printf("\n%s",ptr[i]);
return 0;
}
Program to
count characters,words,lines
#include<stdio.h>
#include<conio.h>
void main()
{
char
line[81], ctr;
int i,c,end
= 0, characters = 0, words = 0, lines = 0;
clrscr();
printf("\nKEY
IN THE TEXT" );
printf("GIVE
ONE SPACE AFTER EACH WORD.\n");
printf("WHEN
COMPLETED, PRESS - ENTER\n\n");
while (end
== 0)
{
c = 0;
while ((ctr
= getchar()) != '\n')
line[c++] =
ctr;
line[c] =
'\0';
if (line[0]
== '\0')
break;
else
{
words++;
for (i = 0;
line[i] != '\0'; i++)
if (line[i]
== ' ' || line[i] == '\t')
words++;
}
lines =
lines + 1;
characters =
characters + strlen(line);
}
printf("\n");
printf("\nNumber
of lines = %d", lines);
printf("\nNumber
of words = %d", words);
printf("\nNumber
of characters = %d", characters);
}
