Notes

1)Sum and avg

#include <stdio.h>
int main()
{
int a[50],sum=0,i,n;
float avg;
printf("enter the number of elements in the array:");
scanf("%d",&n);
printf("enter the elements:n");
for(i=0;i<n;i++)
{
scanf("%d",&a[i]);
}
for(i=0;i<n;i++)
{
sum=sum+a[i];
}
avg=sum/n;
printf("sum is %dn",sum);
printf("average is %fn",avg);
return (0);
}

2) LINEAR SEARCH
#include <stdio.h>
void main()
{
int i,num, search, found = 0, a[15];
printf("Enter the number of elements: ");
scanf("%d", &num);
printf("Enter the elements n");
for (i = 0; i < num; i++)
{
scanf("%d", &a[i]);
}
printf("Enter the element to be searched ");
scanf("%d", &search);
for (i = 0; i < num ; i++)
{
if (search == a[i] )
{
found = 1;
break;
}
}
if (found == 1)
printf("Element is present in the array at position %d",i+1);
else
printf("Element is not present in the arrayn");
}


3) STRING COMPARISON

#include <stdio.h>
#include<string.h>
int main()
{
char str1[20];
char str2[20];
int value;
printf("Enter the first string : ");
scanf("%s",str1);
printf("Enter the second string : ");
scanf("%s",str2);
value=strcmp(str1,str2);
if(value==0)
printf("strings are same");
else
printf("strings are not same");
return 0;
}

4) NUMBER PALINDROME

#include <stdio.h>
int main()
{
int r,n,sum=0,temp;
printf("enter the number =");
scanf("%d",&n);
temp=n;
while(n>0)
{
r=n%10;
sum=(sum*10)+r;
n=n/10;
}
if(temp==sum)
printf("palindrome number");
else
printf("not palindrome");
return 0;
}
5) STRING PALINDROME WITHOUT STRING

#include<stdio.h>
int main()
{
char string[40];
int length=0, flag=1,i;
printf("Enter string:n");
scanf("%s",string);
for(i=0;string[i]!='';i++)
{
length++;
}
for(i=0;i<length/2;i++)
{
if( string[i] != string[length-1-i] )
{
flag=0;
break;
}
}
if(flag==1)
{
printf("PALINDROME");
}
else
{
printf("NOT PALINDROME");
}
return 0;
}

6) STRING CONCATENATION WITHOUT STRING FUNC

#include <stdio.h>
int main()
{
char str1[50], str2[50], i, j;
printf("nEnter first string: ");
scanf("%s",str1);
printf("nEnter second string: ");
scanf("%s",str2);
for(i=0; str1[i]!=''; i++);
for(j=0; str2[j]!=''; j++, i++)
{
str1[i]=str2[j];
}
str1[i]='';
printf("n Concatenated String is: %s",str1);
return 0;
}

7) EUCLIDEAN SUM

#include <stdio.h>
#include <math.h>
struct point
{
int x,y;

};
void main()
{
struct point p1,p2;
float distance,x,y;
printf("Enter the X coordinate of Point 1 :");
scanf("%d",&p1.x);
printf("Enter the Y coordinate of Point 1 :");
scanf("%d",&p1.y);
printf("Enter the X coordinate of Point 2 :");
scanf("%d",&p2.x);
printf("Enter the Y coordinate of Point 2 :");
scanf("%d",&p2.y);
x=p2.x-p1.x;
y=p2.y-p1.y;
printf("%f%f",x,y);

distance=sqrt((x*x)+(y*y));
printf("Distance : %2f",distance);
}

8) EMPLOYEE DETAILS

#include <stdio.h>
struct employee
{
char name[30];
int empid;
float salary;
};
void main ()
{
struct employee emp;
printf("nEnter details:n");
printf("Enter name:");
scanf("%s",emp.name);
printf("enetr ID:");
scanf("%d",&emp.empid);
printf("Enter salary:");
scanf("%f",&emp.salary);
printf("nEntered details is:n");
printf("Name:%sn",emp.name);
printf("ID:%dn",emp.empid);
printf("Salary:%fn",emp.salary);
}


9) PERSONAL DETAILS USING UNION

#include <stdio.h>
#include <string.h>
#define C_SIZE 20
union test
{
char name[C_SIZE];
char house[C_SIZE];
char city[C_SIZE];
char state[C_SIZE];
char pincode[C_SIZE];
};
void main()
{
union test t;
printf("Enter the name of person :n");
scanf("%s",t.name);
printf("The name of the person is : n");
puts(t.name);
printf("Enter the house name of person :n");
scanf("%s",t.house);
printf("The house of the person is : n");
puts(t.house);
printf("Enter the city of person :n");
scanf("%s",t.city);
printf("The city of the person is : n");
puts(t.city);
printf("Enter the state of person :n");
scanf("%s",t.state);
printf("The state of the person is : n");
puts(t.state);
printf("Enter the pincode of person :n");
scanf("%s",t.pincode);
printf("The pincode of the person is : n");
puts(t.pincode);
}

10) StRING REVERSE

#include <stdio.h>
void stringreverse(char* s)
{
char r[100];
int begin, end, count = 0;
printf("Input a stringn:n");
scanf("%s",s);
while (s[count] != '')
count++;
end = count - 1;
for (begin = 0; begin < count; begin++)
{
r[begin] = s[end];
end--;
}
r[begin] = '';
printf("Reverse of entered string is %sn",r);
}
void main()
{
char s[100];
stringreverse(s);
}

11) FACTORIAL OF NUMBER USING LOOP

#include <stdio.h>
int main()
{
int num, i, fact = 1;
printf("Enter a number to find factorialn");
scanf("%d",&num);
for(i = 1; i <= num; i++)
{
fact = fact * i;
}
printf("Factorial of %d is %dn", num, fact);
return 0;
}

String reverse using function


#include <stdio.h>
void stringreverse(char* s)
{
char r[100];
int begin, end, count = 0;
printf("Input a stringn");
scanf("%s",s);
while (s[count] != '')
count++;
end = count - 1;
for (begin = 0; begin < count; begin++)
{
r[begin] = s[end];
end--;
}
r[begin] = '';
printf("Reverse of entered string is %sn", r);
}
void main()
{
char s[100];
stringreverse(s);
}





Factorial of a number using loop




#include<stdio.h>
int main()
{
int num, i, fact = 1;
printf("Enter a number to find factorialn");
scanf("%d", &num);
for(i = 1; i <= num; i++)
{
fact = fact * i;
}
printf("Factorial of %d is %dn", num, fact);
return 0;
}

8) EMPLOYEE DETAILS

#include <stdio.h>
struct employee
{
char name[30];
int empid;
float salary;
};
void main ()
{
struct employee emp;
printf("nEnter details:n");
printf("Enter name:");
scanf("%s",emp.name);
printf("enetr ID:");
scanf("%d",&emp.empid);
printf("Enter salary:");
scanf("%f",&emp.salary);
printf("nEntered details is:n");
printf("Name:%sn",emp.name);
printf("ID:%dn",emp.empid);
printf("Salary:%fn",emp.salary);
}


9) PERSONAL DETAILS USING UNION

#include <stdio.h>
#include <string.h>
#define C_SIZE 20
union test
{
char name[C_SIZE];
char house[C_SIZE];
char city[C_SIZE];
char state[C_SIZE];
char pincode[C_SIZE];
};
void main()
{
union test t;
printf("Enter the name of person :n");
scanf("%s",t.name);
printf("The name of the person is : n");
puts(t.name);
printf("Enter the house name of person :n");
scanf("%s",t.house);
printf("The house of the person is : n");
puts(t.house);
printf("Enter the city of person :n");
scanf("%s",t.city);
printf("The city of the person is : n");
puts(t.city);
printf("Enter the state of person :n");
scanf("%s",t.state);
printf("The state of the person is : n");
puts(t.state);
printf("Enter the pincode of person :n");
scanf("%s",t.pincode);
printf("The pincode of the person is : n");
puts(t.pincode);
}

10) StRING REVERSE

#include <stdio.h>
void stringreverse(char* s)
{
char r[100];
int begin, end, count = 0;
printf("Input a stringn:n");
scanf("%s",s);
while (s[count] != '')
count++;
end = count - 1;
for (begin = 0; begin < count; begin++)
{
r[begin] = s[end];
end--;
}
r[begin] = '';
printf("Reverse of entered string is %sn",r);
}
void main()
{
char s[100];
stringreverse(s);
}

11) FACTORIAL OF NUMBER USING LOOP

#include <stdio.h>
int main()
{
int num, i, fact = 1;
printf("Enter a number to find factorialn");
scanf("%d",&num);
for(i = 1; i <= num; i++)
{
fact = fact * i;
}
printf("Factorial of %d is %dn", num, fact);
return 0;
}


1)SUM USING POINTERS

#include <stdio.h>
int main ()
{
int array [5], i, n, sum = 0,*ptr;
printf (" Enter the number of elements in the array:n");
scanf("%d",&n);
printf ("Enter array elements :n");
for ( i = 0; i<n; i++)
scanf ( "%d",& array [i]);
ptr = array;
for(i=0;i<n;i++)
{
sum=sum+*ptr;
ptr++;
}
printf("the sum is :%d",sum);
return 0;
}

SWAP

intswap(int*a,int*b)
{
int temp= *a;
*a=*b;
*b= temp;
}
void main ()
{
int x, y ;
printf("Enter the no: n");
Scanf ("%d%d",&x,&y);
print (" Before Swap X=%dty=%dn”;x,y);
Swap (&x, &y);
Print f after swap
}