Saturday, January 08, 2011

Chapter-9 E.Balagurusamy programming in ANSI


Question:  Write a function exchange to interchange the values of two variables ,say x and y. Illustrate the use of this function, in a calling function .Assume that x and y are defined as global variables.
Answer :
 #include<stdio.h>
#include<conio.h>
Void exchange_value(int I,int j);
Void main  (void)
{
Int x=2,y=3;
Printf(“%d %d”, x,y);
exchange(x,y);
Printf(“%d %d”,x,y);
getch();
}
void  exchange_value(int I,int j);
}
int  t; t=I                                                                                                     ;
i=j; j=t;
printf(“Exchange_value i=%d,j=%d”,I,j);
}
Question: Write a function space(x) that can be used to provide a space of x positions between two output  numbers .Demonstrate its application.

Answer:
#include<stdio.h>
#include<conio.h>
void dinar(void);
void main()
{
 int x=2; ;
 int y=3;
 printf("%d",x);
 dinar();
 printf("%d",y);
}
void dinar(void)
{
 printf("  ");


Question: Use recursive function calls to evaliuate
                   F(x)=x-x3/3!+x5/5!-x7/7!+………

Answer:
#include<stdio.h>
#include<conio.h>
#include<math.h>
double fact(int power)
      {
                    double f=1;
                    if(power==1)
                     return 1;
                    else
                     f=power*fact(power-1);
                    return f;
                    }

void main()
{
  int i=1;
  double x,term,deno,lob,sin,power=3;
 
  scanf("%lf",&x);
  term=x;
  sin=x;
  while(term>=0.0001)
  {
    lob=pow(x,power);
    deno=fact(power);
    term=lob/deno;
    power+=2;
    if(i%2==1)
      sin=sin-term;
    else
      sin=sin+term;
    i++;
  }
  printf("%lf",sin);
  getch();
}

Question:  An n_order polynomial can be evaluated as follows:
     P=(….((a0x+a1)x+a2)x+a3)x+…+an)

Answer:
#include<stdio.h>

#include<conio.h>

typedef struct poly

{

int coeff;

int expo;

}p;

p p1[10],p2[10],p3[10];

void main()

{

int t1,t2,t3,k;
int read(p p1[10]);
int add(p p1[10],p p2[10],int t1,int t2,p p3[10]);
void print(p p2[10],int t2);
void printo(p pp[10],int t2);
t1=read(p1);
print(p1,t1);
t2=read(p2);
print(p2,t2);
t3=add(p1,p2,t1,t2,p3);
printo(p3,t3);
getch();
}
int read(p p[10])
{
int t1,i;
printf("\n Enter the total no of terms");
scanf("%d",&t1);
printf("\n Enter the coeff and expo in descending order");
for(i=0;i<t1;i++)
scanf("%d%d",&p[i].coeff,&p[i].expo);
return(t1);
}
int add(p p1[10],p p2[10],int t1,int t2,p p3[10])
{
int i,j,k;
int t3;
i=0,j=0,k=0;
while(i<t1 && j<t2)
{
if(p1[i].expo==p2[j].expo)
{
p3[k].coeff=p1[i].coeff+p2[j].coeff;
p3[k].expo=p1[i].expo;
i++;j++;k++;
}
else if(p1[1].expo>p2[j].expo)
{
p3[k].coeff=p1[i].coeff;
p3[k].expo=p1[i].expo;
i++;k++;
}
else
{
p3[k].coeff=p2[j].coeff;
p3[k].expo=p2[j].expo;
j++;k++;
}
}
while(i<t1)
{
p3[k].coeff=p1[i].coeff;
p3[k].expo=p1[i].expo;
i++;k++;
}
while(j<t2)
{
p3[k].coeff=p2[j].coeff;
p3[k].expo=p2[j].expo;
j++;k++;
}
t3=k;
return(t3);
}
void print(p pp[10],int term)
{
int k;
printf("\n\n Given Polynomial:");
for(k=0;k<term-1;k++)
printf("%dx^%d+",pp[k].coeff,pp[k].expo);
printf("%dx^%d",pp[k].coeff,pp[k].expo);
}
void printo(p pp[10],int term)
{
int k;
printf("\n\n The addition of polynomial:");
for(k=0;k<term-1;k++)
printf("%dx^%d+",pp[k].coeff,pp[k].expo);
printf("%dx^%d",pp[k].coeff,pp[k].expo);
}
 Question: Write afuntion to evaluate the polynomial ,using an array variable.Test it using a main program.
The Fibpnacci numbers are defined recursively as follows:
      F1=1
      F2=1
      Fn=Fn-1+Fn-2,n>2
  Write a function that will generate and print the first n Fibanacci numbers . Test the function for
  N=5,10,and15.
Answer::
#include<stdio.h>
#include<conio.h>
Int fib(int  i);
Void main()
{  int F[10];F[0]=0,F[1]=1;
Int fib(int  i)
{  for(i=2;i<10;++i)
F[i]=F[i-2]+F[i-1];
for(i=0;i<10;++i)
printf(“%d\n”,F[i]);
fib(i);
}return(fib);
getch();
}
Question:  Write a function that will round a floating point number to an indicated decimal place .For example the number 17.457 would yeild the value 17.46 when it is rounded off to two decimal places .
Answer:
#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
void liton(void);
void main()
{
 liton();
 getch();
}
void liton(void)
{
char d[100];
 float f;
 int l,i;
  gets(d);
  l=strlen(d);
 for(i=0;i<l;i++)
 {
          if(d[i]=='.')
          {
            if(d[i+2]>=5)
            {
                   d[i+2]++;
         d[i+3]='\0';
                    break;
      }
          }
 }

f=atof(d);
printf("%.2f",f);
 }


Question: Write a function prime that returns l if its argument is a prime number and returns zero otherwise .
Answer:
#include<stdio.h>
#include<conio.h>
Void  isprime(int  n);
Void main()
{ int  I,j,k;
for(i=3;i<100;i+=2)
{  If(isprime(i==1))
{ k=0;j=I;
While(j>0)
{ k+=j%10;   j=j/10;
}
If(isprime(k==1))
Printf(“%d”,i);
}
}
} void  isprime(int  n)
{ int  m; for(m=2;m<=(n/2);m++)
{ if(n%m==0)
{ break;
getch();
}
Question: Write a function that will scan a character string passed as an argument and convert all lowercase characters into their uppercase equivalents.
Answer:
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
Char lower_to_upper(char c1);
{char c2;
C2=(c1>=’a&&c1<=’z’)?(‘A’+c1-‘a’):c2;
Return(c2);
main()
{ char lower,upper;
Printf(“enter a lowercase letter”);
Scanf(“%c”,&lower);
Upper=lower_to_upper(lower);
Printf(“uppercase  equivalent  is %c\n ”,upper);
getch();
}
Question: Develop a top doun modular program to implement a calculator .The program should request the user to input two numbers and display one of the following as per the desire of the user:
   (a ) sum of the numbers
    (b)  Difference  of the numbers
    (c) Product of the numbers
..    (d) Division of the numbers
  Provide separate functions for performing various tasks such as reading ,cakculating and displaying. Calculating module should call second   level moduls to perform the individual mathematical operations.   The main function should have only function calls.
Answer: (a)
#include<stdio.h>
#include<conio.h>
Void sum (int I,int j) ;
Void main()
{
sum(5,6);
getch();
}
Void sum(int I, int j);
{
Int total;
Total=i+j;
Printf(“%d”,total);
}
(b)
#include<stdio.h>
#include<conio.h>
Void diff (int I,int j) ;
Void main()
{
diff(5,6);
getch();
}
Void diff(int I, int j);
{
Int total;
Total=i-j;
printf(“%d”,total);
}
(c)
#include<stdio.h>
#include<conio.h>
void prod (int I,int j) ;
void main()
{
product(5,6);
getch();
}
void product(int I, int j);
{
Int total;
Total=i-j;
printf(“%d”,total);
}
(d)
#include<stdio.h>
#include<conio.h>
void div (int I,int j) ;
void main()
{
div(5,6);
getch();
}
void div(int I, int j);
{
int total;
Total=i-j;
printf(“%d”,total);
}
Question: Develop a modular interactive program using functions that resds the values of three sides of triangle and displays either its area or its perimeter as per the request of the user. Given the three sides,a,b,c.
                   Perimeter=a+b+c
                   Area=sqrt(s-a)(s-b)(s-c)    Wher s=(a+b+c)/2
sides,a,b,c.
                   Perimeter=a+b+c
                   Area=sqrt(s-a)(s-b)(s-c)    Wher s=(a+b+c)/2
Answer:
#include<stdio.h>
#include<conio.h>
void area(int a,int b,int c);
void  perimeter(int a,int b,int c);
void  main()
{
   printf(“input  a,b,c”);
scanf(“%d  %d  %d”,&a,&b,&c);
}
  void  perimeter(int a,int b,int c)
{
  int  s;    s=(a+b+c)/2;
printf(“%d”,s);
}
void  area(int  a,int b,int c,int s)
{
   float  A;  A=sqrt((s-a)*(s-b)*(s-c));
  printf(“%f”,A);
getch();
}
Question: Write a function that can be called to find the largest element of an m by n matrix.
Answer:
 #include<stdio.h>
#include<conio.h>
void max_ele(int r,int c,int dinar[][11]);
void main()
{
   int sazon[11][11]={0},k;
   int r,c,i,j;
   printf("Enter nomber of rows and columns(Maximun number can be 11):");
   scanf("%d%d",&r,&c);
   printf("Enter the elements of the matrix in rowwise:\n");
   for(i=0;i<r;i++)
     for(j=0;j<c;j++)
     {
          scanf("%d",&k);
          sazon[i][j]=k;
     }
  max_ele(r,c,sazon);
  getch();
}
void max_ele(int r,int c,int sazon[][11])
{
   int max,i,j;
   max=sazon[0][0];
   for(i=0;i<r;i++)
    for(j=0;j<c;j++)
    {
       if(max<sazon[i][j])
       {
           max=sazon[i][j];
       }
    }

   printf("\nThe maximum elements is:%d",max);
}

Question: Write a function that can be called to compute the product of two matrixes of size m by n and n by m.The main function provides  the values for m and n and two matrices.
main function provides  the values for m and n and two matrices.
Answer:
 #include<stdio.h>
#include<conio.h>
void  prod(int  a[4][4] ,int  b[4][4]);
void main()

{   int  r,q,m,n,I,j,y;
printf(“input   row  and  column  of  A  matrix”);  scanf(“%d  %d”, &m, &n);
printf(“Input  row  and  column  of  B matrix”);    scanf(“%d  %d”,&q ,&r);
if(n==q)
printf(“A and B  can  multiplied”);  printf(“resultant  matrix  is  %d *%d”,m,r);
printf(“input  A  matrix”);    mat(a,m,n);
printf(“input  B  matrix”);    mat(b,q,r);
void  prod(int  a[4][4] ,int  b[4][4])
{
  for(i=0; i<m; ++i)    for(j=0; j<q; ++j)
C[i][j]=0;   for(y=0;y<n;++y)
C[i][j]=c[i][j+a[i][y] *b[y][j];
}
   printf(“resulatant  of  A  and  B  matrix”);   matrix(c,m,r);
}
   else
{
  printf(“A col  be  equal  to  row  0f  B matrix” );   printf(“matrixes   can  not  be  multiplied”);
}
    mat(a,m,n);      int  a[4][4],m,n;  
}
    int  I,j;   for(i=0; i<m; i++)    for(j=0; j<n; j++)
  scanf(“%d”,&a[i][j]);
}
   mat(a,m,n);
{
         int  a[4][4],m,n;  
}
    int  I,j;   for(i=0; i<m; i++)    for(j=0; j<n; j++)
  printf(“%d”,a[i][j]);
     }
getch();
}
Question:  Design and code an interactive modular programming that will use function to a matrix of m by n size. compute column average and rows aver ages , and then print the entire matrix with averages shown in respective rows and columns.
Answer:

Question: Develop a top down modular program  that will perform the following  tasks
 (a)Read two integer arrays with unsorted  element               (b)Sort them in accending order
 (c)Merge the sorted arrays                                                 (d)Print the sorted list
Use function  for carrying out each of  the above tasks. The main  function should have only function calls.
Answer:
#include<stdio.h>
#include<conio.h>
int  sort (int  a[8], int  b[8]);
Void main()
{  int  I,j;  printf(“array  before  sort”);
Printf(“enter  dimension”’);   scanf(“%d”,&j);
Printf(“enter  %d  values  for  a , j”);
for(i=0;  i<j; i++)   scanf(%d”,&a[i]);
 Printf(“enter  %d  values  for  b , j”);
for(i=0;  i<j; i++)   scanf(%d”,&b[i]);
Printf(“element  array  of  a”);
for(i=0;  i<j; i++)   scanf(%d\t”,&a[i]);
Printf(“element  array  of  b”);
for(i=0;  i<j; i++)   scanf(%d\t”,&b[i]);
for(i=0;  i<j; i++)  
{    a[i]=a[i]+b[i];   b[i]=a[i]-b[i];
  a[i]=a[i]+b[i];      sort(a[8],b[8]);
}    printf(“after  sorting ”);
Int  sort (int  a[8], int  b[8])
{    Printf(“element  array  of  a”);
     for(i=0;  i<j; i++)   scanf(%d\t”,&a[i]);
Printf(“\n\n\n\n\n\n”);
Printf(“element  array  of  b”);
for(i=0;  i<j; i++)   scanf(%d\t”,&b[i]);
return(sorted  list);    getch();
}
Question: Develop your owx functions for performing following operations on strings:
     (a) copying one string to another
    (b) comparing two strings
   (c) adding a string to the end of another string
Write a driver program to test your functions.
functions.
Answer:
(A)
#include<stdio.h>
#include<conio.h>
#include<string.h>
Char  *strcpy(char *str1,char *str2);
void main()
{ strcpy(str1,str2);
return(str1,str2);
} char *strcpy(char*str1,char*str2)
{ char str1[10];char str2[10]=”murad”;
puts(str1);  puts(str2);
}
(B)
#include<stdio.h>
#include<conio.h>
#include<string.h>
char  *strcmp(char *str1,char *str2);
void main()
{ strcmp(str1,str2);
return(str1,str2);
} char *strcmp(char*str1,char*str2)
{ char str1[10];char str2[10]=”murad”;
gets(str1);   gets(str2);
}    (C)
include<stdio.h>
#include<conio.h>
#include<string.h>
char  *strcat(char *str1,char *str2);
void main()
{ strcat(str1,str2);
return(str1,str2);
} char *strcat(char*str1,char*str2)
{ char str1[10];char str2[10]=”murad”;
gets(str1);  gets(str2);
puts(b);
}
Question: Write a program that invokes a function called find() to perform the following tasker.
       (a)  Receives a character array and a single character.
      (b)  Returns 1 if the specified character is found in the array ,0 otherwise.
Answer:
#include<stdio.h>
#include<conio.h>
void  find(int  num[8]);
void main()
{   int a[8],i;
for(i=0;  i<=8;  ++i)
Printf(“%d”,num[j];
  if(a[i])=i;
find(a[i]);
getch();
}
void  find(int num[8])
{   int j;
if(a[i])=i)
return(1);
else
return(0);
}
printf(“%d”,num[j];
}
Question:  Design a function locate () that takes two character arrays s1 and s2 and one integer value m as parameters  and inserts  the strings s2 into s1 immediately after the index m.Write a program to test the function  using a real-life situation.(Hints :s2 may be a missing word  in s1 that represents a line of text).
Answer:
 #include<stdio.h>
#include<string.h>
void lokate(void);

void main()
{
          lokate();
}
void lokate(void)
{

           char s1[40],s2[10],s3[30];
           int m,l1,l2,i,j,k;
           printf("Input string s1:");
           gets(s1);
           printf("Input string s2:");
           gets(s2);
           l1=strlen(s1);
           l2=strlen(s2);
           printf("Input position where s2 is missed from s1:");
           scanf("%d",&m);

           i=0;j=m;

           for(m=j-1;m<l1;m++)
           {
                   s3[i++]=s1[m];
           }
           //for s3

           for(k=0;k<l2;k++)
           {
            s1[j++]=s2[k];
           }
           //j--;
            for(k=0;k<i;k++)
            {
                    s1[j++]=s3[k];
            }
            s1[j]='\0';
            puts(s1);


}

Question: Write a function that takes an integer parameter m representing the month number of the year  and returns the corresponding  name of the month .For instants ,if m=3, the month is March.Test your program.
Answer:
 #include<stdio.h>
#include<conio.h>
void month(int n,char a[]);
void main()
{
          int k;
          char dinar[15]="";
          printf("Input month number:");
          scanf("%d",&k);
          month(k,dinar);
          printf("%s",dinar);
}
void month(int n,char a[])
{
           switch(n)
           {
                     case 1:strcpy(a,"January");
                                        break;
                     case 2:strcpy(a,"Fabruary");
                                        break;
                     case 3:strcpy(a,"March");
                                        break;
                     case 4:strcpy(a,"April");
                                        break;
                     case 5:strcpy(a,"May");
                                        break;
                     case 6:strcpy(a,"June");
                                        break;
                     case 7:strcpy(a,"July");
                                        break;
                     case 8:strcpy(a,"August");
                                        break;
                     case 9:strcpy(a,"September");
                                        break;
                     case 10:strcpy(a,"October");
                                        break;
                     case 11:strcpy(a,"November");
                                        break;
                     case 12:strcpy(a,"December");
                                        break;
           }
getch();
}

Question: In preparing  the calander for a year we need to know whether the particular year is leap year or not .Design a function leap () that receives the year as a parameter and returns an appropriate messege.
What modifications are required if we want to use the function in preparing the actual calender?
Answer:
#include<stdio.h>
#include<conio.h>
Int  leap(int  y);
Void  main()
{  printf(“input a  year”);     scanf(“%d”,&y);
If(((y%4)==0)&&((y%100)!=0)  || ((y%400)==0))
Printf(“ This is a leap year”);
else 
 printf(“ This is not a leap year”);
leap (y);
}     int leap(int  y);
{  return(y);
}
Question: Write a function that receives a floating point value x and returns it as a value rounded to two nearest decimal place.For example ,the value 123.4567 will be rounded  to 123.46(Hint:Seek help of one of the math functions available in math library).
Answer:
#include<stdio.h>
#include<conio.h>
#include<math.h>
float dec_num(float a);
void main()
{    printf(“  enter  real  number  to get  nearest  in teger number ”);
    Scanf(“%f”,&a);
float dec_num(float a)
{  if(a>=0)
P=a+0.5;
else    
p=a-0.5;
}
return(int(p));
getch();

1 comment:

  1. plz give solutions of all chapters of review questions.
    plz.

    ReplyDelete