Solved Programs

Q.1 Write a program to covert a number from binary to decimal and vice versa.
-----------------------------------------------------------------------------------------------

//1.Binary to decimal Conversion and
//2.Decimal to Binary
//coded by JA,BPC PVM
void main()
{
int ch;
void bin2dec(void);
void dec2bin(void);
clrscr();
printf("Enter a choice\n");
printf("1. Binary To Decimal\n");
printf("2. Decimal To Binary\n");
scanf("%d",&ch);
switch(ch)
{
case 1: bin2dec();
break;
case 2: dec2bin();
break;
default: printf("Oops... Invalid Choice");
}
getch();
}
void bin2dec()
{
int n,b=1,ans=0,r;
printf("Enter a Binary Number\n");
scanf("%d",&n);
while(n>0)
{
r=n%10;
ans=ans+r*b;
n=n/10;
b=2*b;
}
printf("Decimal#:%d",ans);
}
void dec2bin()
{
int a,d,b=1,i,ans=0;
printf("Enter a decimal number\n");
scanf("%d",&d);
while(d>0)
{
a=d%2;
//printf("%d\n",a);
d=d/2;
a=b*a;
ans=ans+a;
b=b*10;
}
printf("Binary#:%d",ans);
}

Qn.2 Program to find sum of natural numbers upto n

--------------------------------------------------------------------
main() {

int i, sum;

i=1;

sum=0;

printf(“Enter the Limit n”);

scanf(“%d”, &n)

while(i<=n)

                {

                sum = sum + i;

                }

printf(“ Sum of Natural numbers upto %d is: %d”,  n, sum);

}

Qn.3 Program to find factorial of n

---------------------------------------------

main() {

int i, f;

i=1;

f = 1;

printf(“Enter the Limit n”);

scanf(“%d”, &n)

while(i<=n)

                {

                f = f * i;

                }

printf(“ Factorial of %d is: %d”,  n, f);

}

Qn.4 Program to find the multiplication table of n

----------------------------------------------------------------

main( ) {

int i,n,prd;

printf(“Enter the number n”);

scanf(“%d”, &n);

printf(“\n Multiplication Table of %d”, n);

for(i=1; i<=n; i++)

                {

                prd = i*n;

                printf(“%d x %d = %d\n”, i, n, prd);

                }

}

Qn.5 Program to odd number series upto n

-------------------------------------------------------

main()

{

int i, n;

printf(“Enter the number n”);

scanf(“%d”, &n);

printf(“\n Odd number series upto %d\n”, n);

for(i=1; i<=n; i++)

                {

                if( i%2 !=0 ) printf(“%d \t”, i);

                }

}

Qn.6 Fibonacci sequence is the series of numbers:

---------------------------------------------------------------

main()

{

int n, t1=0,t2 =1;

printf(“Enter n”);

scanf(“%d”,&n);

printf(“%d\t%d\t”,t1,t2);

                for( i = 3; i<=n; i++)

                                {

                                nt = t1 +t2;

                                printf(“%d\t”,nt);

                                t1 = t2;

                                t2 = nt;

                                }

}

Qn.7 Write a program to convert temperature from Celsius to Fahrenheit

 ----------------------------------------------------------------------------------------------

/* Example Program – nested if – else statement */

main()  {

float t, nt; char v;

printf(“Enter  the Temperature\n”); scanf(“%d”,&t);

printf(“Enter  the Temperature Scale: C or F \n”); scanf(“%c”,&v);

if(( v == ‘C’) || (v == ‘F’) )

                {

                     if(v == ‘C’)

                     nt = (9/5 * t ) + 32;  printf( “The temperature after conversion is %f”, nt);

                 else

                     nt = (t – 32) * 5/9;   printf( “The temperature after conversion is %f”, nt);

                }

else

                printf( “The temperature Code entered is INVALID”);

}

Qn.8 Check for Prime numbers program in C language

------------------------------------------------------------------------
#include <stdio.h>

main()

{

  int n, i, c = 0;

  printf("Enter any number n:");

  scanf("%d", &n);

  for (i = 1; i <= n; i++)

 {

      if (n % i == 0)

{

         c++;

             }

  }

  if (c == 2)

  printf("n is a Prime number");

  else

  printf("n is not a Prime number");

}

Qn.9 Finding GCD

------------------------

main()

{

int n1,n2,i, hcf;

printf(“Input two numbers\n”);

if(n1<n2) min=n1; else min = n2;

for(i=1;i<=min;i++)

{

If((n1%i==0)&&(n2%i==0))

{

hcf=i;

}

}

printf(“HCF of %d and %d is:%d”, n1,n2,hcf);

}

Qn. 10 Generate Prime Numbers Series

---------------------------------------------------

#include <stdio.h>

main()

{

  int n, i, j,c;

  printf("Enter a Limit: n\n");

  scanf("%d", &n);

  printf(“Prime Number series\n”);

  for (i = 2; i <= n; i++)

{

c = 0;

                         for (j = 1; j<= i; j++)

{

if (n % i == 0) c++;

                        }

    if (c == 2) printf("%d\nt", i);

}

}

Qn: 11 Programs with Arrays – finding sum of elements

------------------------------------------------------------------------

void main()

{

 int values[5]={11,1,3,6,10};

    for (int i = 1; i < 5; i++)

   {

      sum = values[i];

    }

    printf(“Sum of Array Elements %d”, sum);

}

Modifying the above program to accept data at run time

void main()

{

    int v[5],sum=0;

    printf(“Input Array Elements\n”):

    for (int i = 0; i < 5; i++)

   {

      scanf(“%d”, &v[i]);

    }

  printf(“Sum of Array  Elements is:\n”);

for (int i = 0; i < 5; i++)

   {

      sum = sum + v[i];

    }

printf(“%d”, sum);

}

Qn.12 Program to find largest of n array elements

----------------------------------------------------------------

void main()

{

    int i, v[25],n, larg;

    printf(“Enter Size\n”);

    scanf(“%d”, &n);

    printf(“Input Array Elements\n”):

    for ( i = 0; i < n; i++)

   {

      scanf(“%d”, &v[i]);

    }

larg = v[0];

for ( i = 0; i < n; i++)

   {

      if( v[i] > larg) larg = v[i];

    }

printf(“\n Largest is %d”, larg);

}

Exercise Qn: Program to list even numbers from an array of n elements

Qn13. Find length of a string?

main(){

char pqr[15];

int  i, L=0;

printf(“Enter a string”);

scanf(“%s”,pqr);

            for(i=0; pqr[i] !=‘\0’; i++)

            {

            L=L+1;

            }

printf(“Length of the string is %d”, L);

}

Qn.14. Reversing a string?

main()

{

char pqr[15];

int  i, L=0;

printf(“Enter a string”);

scanf(“%s”,pqr);

for(i=0; pqr[i] !=‘\0’; i++)

{

L=L+1;

}

i= L-1;

while(i < =0)

{

printf(“%c”, pqr[i]);

i=i-1;

}

}

Qn.14. Count vowels?

main()

{

char pqr[15];

int  i, L=0;

printf(“Enter a string”);

scanf(“%s”,pqr);

for(i=0; pqr[i]!=‘\0’; i++)

{

if ( (pqr[i]==‘a”)|| (pqr[i]==‘e’)|| (pqr[i]==‘i’)|| (pqr[i]==‘o’)||(pqr[i]==‘u’))

   L= L+1;

}

printf(“Count of vowels is %d”, L);

}

Qn.15. Compare two strings?

main()

{

char pqr[15],xyz[15];

int  i, L1=0, L2=0, flag=0;

printf(“Enter two string”);

scanf(“%c%c”,pqr, xyz);

for(i=0; pqr[i] !=‘\0’; i++)

{

L1=L1+1;

}

for(i=0; xyz[i] !=‘\0’; i++)

{

L2=L2+1;

if(L1 != L2)

            printf(“Not Similar”);

else

{

for (i=0; i<L1; i++)

            {

            if(pqr[i] != xyz[i])

            flag=1;

            }

}

if(flag==0)

            printf(“Two strings similar”);

            else     

            printf(“Two strings similar”);

}

}

Qn.16. Count occurrence of a character?

main()

{

char h, pqr[15];

int  i, ans =0;

printf(“Enter a string”);

scanf(“%s”,pqr);

printf(“Enter a Character”);

scanf(“%c”, &h);

for(i=0; pqr[i]!=‘\0’; i++)

{

if ( pqr[i]==h )

ans =ans +1;

}

printf(“Count of  %c in %s is %d:”, h, pqr, ans);

}

Qn.17 Write a program to concatenate two strings

main()

{

char str1[10], str2[10], str3[20];

int  i, L = 0, J = 0;

printf(“Enter String 1\n”);

scanf(“%s”, str1);

printf(“Enter String 2\n”);

scanf(“%s”, str2);

for(i=0; str1[i] !=‘\0’; i++)

{

str3[i] = str1[i];

L = L+1;

}

J = L ;

for(i=0; str2[i] !=‘\0’; i++)

{

str3[J] = str2[i];

J++;

}

str3[J] = ‘\0’;

printf(“The Concatenated String is: %s”, str3);

} 

Q.18. Roots of Quadratic Equation

#include<math.h>

#include<stdio.h>

#include<string.h>

#include<conio.h>

void main()

{

int a,b,c,d,d1,d2,p1,x,y;

float d3,p2;

clrscr();

printf(“\n Enter the values of a,b and c”);

scanf(“%d%d%d”,&a,&b,&c);

d=(b*b)-(4*a*c);

if(d>0)

{

d1=sqrt(d);

x=(-b+d1)/(2*a);

y=(-b-d1)/(2*a);

printf(\n Roots are Real and Unequal”);

print(“\nsolution:\nRoot1=%d\Root2=%d”,x,y);

}

if(d==0)

{

x=(-b)/(2*a);

y=(-b)/(2*a);

printf(“\n Roots are Real and Equal)

printf(“\n Root1=%d\n Root2=%d”,x,y);

}

if(d<0)

{

printf(“\nRoot are Imaginary”);

d2  = -d;

d3 = sqrt(d2);

p1 = -b/(2*a);

p2 = d3/(2*a);

printf(“\nRoot 1=%d+%f”,p1,p2);

printf(“\n Root 2=%d-i,%f”,p1,p2);

}

}