Programming C Tutorial

REVERSE A NUMBER USING RECURSION IN C PROGRAM

2011-06-11T14:08:00.001+05:30

#include<stdio.h>

int main(){

int num,rev;

printf("\nEnter a number :");

scanf("%d",&num);

rev=reverse(num);

printf("\nAfter reverse the no is :%d",rev);

return 0;

}

int sum=0,r;

reverse(int num){

if(num){

r=num%10;

sum=sum*10+r;

reverse(num/10);

}

else

return sum;

}

FIND POWER OF A NUMBER USING RECURSION USING C PROGRAM

2011-06-11T14:07:00.003+05:30

#include<stdio.h>

int main(){

int pow,num;

long int res;

long int power(int,int);

printf("\nEnter a number: ");

scanf("%d",&num);

printf("\nEnter power: ");

scanf("%d",&pow);

res=power(num,pow);

printf("\n%d to the power %d is: %ld",num,pow,res);

return 0;

}

int i=1;

long int sum=1;

long int power(int num,int pow){

if(i<=pow){

sum=sum*num;

power(num,pow-1);

}

else

return sum;

}

FIND SUM OF DIGITS OF A NUMBER USING RECURSION USING C PROGRAM

2011-06-11T14:06:00.005+05:30

#include<stdio.h>

int main(){

int num,x;

clrscr();

printf("\nEnter a number: ");

scanf("%d",&num);

x=findsum(num);

printf("Sum of the digits of %d is: %d",num,x);

return 0;

}

int r,s;

int findsum(int n){

if(n){

r=n%10;

s=s+r;

findsum(n/10);

}

else

return s;

}

FIND GCD OF A NUMBER USING RECURSION IN C PROGRAM

2011-06-11T14:06:00.001+05:30

#include<stdio.h>

int main(){

int n1,n2,gcd;

printf("\nEnter two numbers: ");

scanf("%d %d",&n1,&n2);

gcd=findgcd(n1,n2);

printf("\nGCD of %d and %d is: %d",n1,n2,gcd);

return 0;

}

int findgcd(int x,int y){

while(x!=y){

if(x>y)

return findgcd(x-y,y);

else

return findgcd(x,y-x);

}

return x;

}

FIND FACTORIAL OF A NUMBER USING RECURSION IN C PROGRAM

2011-06-11T14:05:00.001+05:30

#include<stdio.h>

int main(){

int num,f;

printf("\nEnter a number: ");

scanf("%d",&num);

f=fact(num);

printf("\nFactorial of %d is: %d",num,f);

return 0;

}

int fact(int n){

if(n==1)

return 1;

else

return(n*fact(n-1));

}

BINARY SEARCH THROUGH RECURSSION USING C PROGRAM

2011-06-11T14:04:00.002+05:30

#include<stdio.h>

int main(){

int a[10],i,n,m,c,l,u;

printf("Enter the size of an array->");

scanf("%d",&n);

printf("\nEnter the elements of the array->");

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

scanf("%d",&a[i]);

}

printf("\nThe elements of an array are->");

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

printf(" %d",a[i]);

}

printf("\nEnter the number to be search->");

scanf("%d",&m);

l=0,u=n-1;

c=binary(a,n,m,l,u);

if(c==0)

printf("\nThe number is not in the list");

else

printf("\nThe number is found");

return 0;

}

int binary(int a[],int n,int m,int l,int u){

int mid,c=0;

if(l<=u){

mid=(l+u)/2;

if(m==a[mid]){

c=1;

}

else if(m<a[mid]){

return binary(a,n,m,l,mid-1);

}

else

return binary(a,n,m,mid+1,u);

}

else

return c;

}

BINARY SEARCH USING C PROGRAM

2011-06-11T14:02:00.002+05:30

#include<stdio.h>

int main(){

int a[10],i,n,m,c=0,l,u,mid;

printf("Enter the size of an array->");

scanf("%d",&n);

printf("\nEnter the elements of the array->");

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

scanf("%d",&a[i]);

}

printf("\nThe elements of an array are->");

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

printf(" %d",a[i]);

}

printf("\nEnter the number to be search->");

scanf("%d",&m);

l=0,u=n-1;

while(l<=u){

mid=(l+u)/2;

if(m==a[mid]){

c=1;

break;

}

else if(m<a[mid]){

u=mid-1;

}

else

l=mid+1;

}

if(c==0)

printf("\nThe number is not in the list");

else

printf("\nThe number is found");

return 0;

}

C programming questions and answer

2011-06-11T13:59:00.002+05:30

#include<stdio.h>

int main(){

int a[10],i,n,m,c=0;

printf("Enter the size of an array");

scanf("%d",&n);

printf("\nEnter the elements of the array");

for(i=0;i<=n-1;i++){

scanf("%d",&a[i]);

}

printf("\nThe elements of an array are");

for(i=0;i<=n-1;i++){

printf(" %d",a[i]);

}

printf("\nEnter the number to be search");

scanf("%d",&m);

for(i=0;i<=n-1;i++){

if(a[i]==m){

c=1;

break;

}

if(c==0)

printf("\nThe number is not in the list");

else

printf("\nThe number is found");

return 0;

}

Division of large numbers in c

2011-06-11T13:58:00.002+05:30

#include<stdio.h>

#include<math.h>

#include<stdlib.h>

#include<string.h>

#define MAX 10000

char * division(char [],unsigned long);

int main(){

char a[MAX];

unsigned long b;

char *c;

printf("Enter the divdend : ");

scanf("%s",a);

printf("Enter the divisor : ");

scanf("%lu",&b);

c = division(a,b);

printf("\nQuotient of the division : ");

printf("%s",c);

return 0;

}

char * division(char a[],unsigned long b){

static char c[MAX];

int la;

int i,k=0,flag=0;

unsigned long temp=1,reminder;

la=strlen(a);

for(i=0;i<=la;i++){

a[i] = a[i] - 48;

}

temp = a[0];

reminder = a[0];

for(i=1;i<=la;i++){

if(b<=temp){

c[k++] = temp/b;

temp = temp % b;

reminder = temp;

temp =temp*10 + a[i];

flag=1;

}

else{

reminder = temp;

temp =temp*10 + a[i];

if(flag==1)

c[k++] = 0;

}

for(i=0;i<k;i++){

c[i]=c[i]+48;

}

c[i]= '\0';

printf("Reminder of division: %lu ",reminder);

return c;

}

Multiplication of large numbers in c

2011-06-11T13:57:00.001+05:30

#include<stdio.h>

#include<math.h>

#include<stdlib.h>

#include<string.h>

#define MAX 10000

char * multiply(char [],char[]);

int main(){

char a[MAX];

char b[MAX];

char *c;

int la,lb;

int i;

printf("Enter the first number : ");

scanf("%s",a);

printf("Enter the second number : ");

scanf("%s",b);

printf("Multiplication of two numbers : ");

c = multiply(a,b);

printf("%s",c);

return 0;

}

char * multiply(char a[],char b[]){

static char mul[MAX];

char c[MAX];

char temp[MAX];

int la,lb;

int i,j,k=0,x=0,y;

long int r=0;

long sum = 0;

la=strlen(a)-1;

lb=strlen(b)-1;

for(i=0;i<=la;i++){

a[i] = a[i] - 48;

}

for(i=0;i<=lb;i++){

b[i] = b[i] - 48;

}

for(i=lb;i>=0;i--){

r=0;

for(j=la;j>=0;j--){

temp[k++] = (b[i]*a[j] + r)%10;

r = (b[i]*a[j]+r)/10;

}

temp[k++] = r;

x++;

for(y = 0;y<x;y++){

temp[k++] = 0;

}

k=0;

r=0;

for(i=0;i<la+lb+2;i++){

sum =0;

y=0;

for(j=1;j<=lb+1;j++){

if(i <= la+j){

sum = sum + temp[y+i];

}

y += j + la + 1;

}

c[k++] = (sum+r) %10;

r = (sum+r)/10;

}

c[k] = r;

j=0;

for(i=k-1;i>=0;i--){

mul[j++]=c[i] + 48;

}

mul[j]='\0';

return mul;

}

Factorial of 100 in c

2011-06-11T13:56:00.003+05:30

#include<stdio.h>

#define MAX 10000

void factorialof(int);

void multiply(int);

int length = 0;

int fact[MAX];

int main(){

int num;

int i;

printf("Enter any integer number : ");

scanf("%d",&num);

fact[0]=1;

factorialof(num);

printf("Factorial is : ");

for(i=length;i>=0;i--){

printf("%d",fact[i]);

}

return 0;

}

Write a c program to find out transport of a matrix

2011-06-10T11:47:00.001+05:30

#include<stdio.h>

int main(){

int a[10][10],b[10][10],i,j,k=0,m,n;

printf("\nEnter the row and column of matrix");

scanf("%d %d",&m,&n);

printf("\nEnter the First matrix->");

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

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

scanf("%d",&a[i][j]);

printf("\nThe matrix is\n");

for(i=0;i<m;i++){

printf("\n");

for(j=0;j<m;j++){

printf("%d\t",a[i][j]);

}

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

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

b[i][j]=0;

for(i=0;i<m;i++){

for(j=0;j<n;j++){

b[i][j]=a[j][i];

printf("\n%d",b[i][j]);

}

printf("\n\nTraspose of a matrix is -> ");

for(i=0;i<m;i++){

printf("\n");

for(j=0;j<m;j++){

printf("%d\t",b[i][j]);

}

return 0;

}

FIND OUT SUM OF DIAGONAL ELEMENTS OF A MATRIX USING

2011-06-10T11:46:00.000+05:30

#include<stdio.h>

int main(){

int a[10][10],i,j,sum=0,m,n;

printf("\nEnter the row and column of matrix");

scanf("%d %d",&m,&n);

printf("\nEnter the First matrix->");

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

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

scanf("%d",&a[i][j]);

printf("\nThe matrix is\n");

for(i=0;i<m;i++){

printf("\n");

for(j=0;j<m;j++){

printf("%d\t",a[i][j]);

}

for(i=0;i<m;i++){

for(j=0;j<n;j++){

if(i==j)

sum=sum+a[i][j];

}

printf("\n\nSum of the diagonal elements of a matrix is -> ");

printf("%d",sum);

return 0;

}

MULTIPLICATION OF TWO MATRICES USING C PROGRAM

2011-06-10T11:44:00.001+05:30

#include<stdio.h>

int main(){

int a[5][5],b[5][5],c[5][5],i,j,k,sum=0,m,n,o,p;

printf("\nEnter the row and column of first matrix");

scanf("%d %d",&m,&n);

printf("\nEnter the row and column of second matrix");

scanf("%d %d",&o,&p);

if(n!=o){

printf("Matrix mutiplication is not possible");

printf("\nColumn of first matrix must be same as row of second matrix");

}

else{

printf("\nEnter the First matrix->");

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

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

scanf("%d",&a[i][j]);

printf("\nEnter the Second matrix->");

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

for(j=0;j<p;j++)

scanf("%d",&b[i][j]);

printf("\nThe First matrix is\n");

for(i=0;i<m;i++){

printf("\n");

for(j=0;j<n;j++){

printf("%d\t",a[i][j]);

}

printf("\nThe Second matrix is\n");

for(i=0;i<o;i++){

printf("\n");

for(j=0;j<p;j++){

printf("%d\t",b[i][j]);

}

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

for(j=0;j<p;j++)

c[i][j]=0;

for(i=0;i<m;i++){ //row of first matrix

for(j=0;j<p;j++){ //column of second matrix

sum=0;

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

sum=sum+a[i][k]*b[k][j];

c[i][j]=sum;

}

printf("\nThe multiplication of two matrix is\n");

for(i=0;i<m;i++){

printf("\n");

for(j=0;j<p;j++){

printf("%d\t",c[i][j]);

}

return 0;

}

ADDITION OF TWO MATRICES USING C PROGRAM

2011-06-10T11:43:00.001+05:30

#include<stdio.h>

int main(){

int a[3][3],b[3][3],c[3][3],i,j;

printf("Enter the First matrix->");

for(i=0;i<3;i++)

for(j=0;j<3;j++)

scanf("%d",&a[i][j]);

printf("\nEnter the Second matrix->");

for(i=0;i<3;i++)

for(j=0;j<3;j++)

scanf("%d",&b[i][j]);

printf("\nThe First matrix is\n");

for(i=0;i<3;i++){

printf("\n");

for(j=0;j<3;j++)

printf("%d\t",a[i][j]);

}

printf("\nThe Second matrix is\n");

for(i=0;i<3;i++){

printf("\n");

for(j=0;j<3;j++)

printf("%d\t",b[i][j]);

}

for(i=0;i<3;i++)

for(j=0;j<3;j++)

c[i][j]=a[i][j]+b[i][j];

printf("\nThe Addition of two matrix is\n");

for(i=0;i<3;i++){

printf("\n");

for(j=0;j<3;j++)

printf("%d\t",c[i][j]);

}

return 0;

}

CONVERSION OF FAREHNITE TO CENTIGRADE USING C PROGRAM

2011-06-10T11:41:00.002+05:30

#include<stdio.h>

int main(){

long int no,n=0,j=1,rem,no1;

printf("Enter any number any binary form->");

scanf("%ld",&no);

no1=no;

while(no!=0){

rem=no%10;

n=n+rem*j;

j=j*2;

no=no/10;

}

printf("\nThe value of binary no. %ld is ->%ld",no1,n);

return 0;

}

CONVERSION OF DECIMAL TO BINARY USING C PROGRAM

2011-06-10T11:41:00.000+05:30

#include<stdio.h>

int main(){

long int m,no=0,a=1;

int n,rem;

printf("Enter any decimal number->");

scanf("%d",&n);

m=n;

while(n!=0){

rem=n%2;

no=no+rem*a;

n=n/2;

a=a*10;

}

printf("The value %ld in binary is->",m);

printf("%ld",no);

return 0;

}

CONVERSION FROM DECIMAL TO OCTAL USING C PROGRAM

2011-06-10T11:40:00.001+05:30

#include<stdio.h>

int main(){

int i=0,j=0,rem=0,a[10],b[10];

long int num;

printf("\nEnter a number :");

scanf("%ld",&num);

while(num){

if(num<8){

a[j++]=num;

break;

}

else{

a[j++]=num%8;

num=num/8;

}

for(i=j-1;i>=0;i--)

b[rem++]=a[i];

printf("\nOctal equivalent :");

for(j=0;j<rem;j++)

printf("%d",b[j]);

return 0;

}

CONVERSION FROM DECIMAL TO OCTAL USING C PROGRAM

2011-06-10T11:39:00.001+05:30

#include<stdio.h>

int main(){

long int no,n=0,j=1,rem,no1;

printf("Enter any number any binary form->");

scanf("%ld",&no);

no1=no;

while(no!=0){

rem=no%10;

n=n+rem*j;

j=j*2;

no=no/10;

}

printf("\nThe value of binary no. %ld is ->%ld",no1,n);

return 0;

}

SWAPPING OF STRINGS USING C PROGRAM

2011-06-10T11:38:00.001+05:30

#include<stdio.h>

int main(){

int i=0,j=0,k=0;

char str1[20],str2[20],temp[20];

puts("Enter first string");

gets(str1);

puts("Enter second string");

gets(str2);

printf("Before swaping the strings are\n");

puts(str1);

puts(str2);

while(str1[i]!='\0'){

temp[j++]=str1[i++];

}

temp[j]='\0';

i=0,j=0;

while(str2[i]!='\0'){

str1[j++]=str2[i++];

}

str1[j]='\0';

i=0,j=0;

while(temp[i]!='\0'){

str2[j++]=temp[i++];

}

str2[j]='\0';

printf("After swaping the strings are\n");

puts(str1);

puts(str2);

return 0;

}

Write a c program for swapping of two arrays

2011-06-10T11:37:00.000+05:30

#include<stdio.h>

int main(){

int a[10],b[10],c[10],i;

printf("Enter First array->");

for(i=0;i<10;i++)

scanf("%d",&a[i]);

printf("\nEnter Second array->");

for(i=0;i<10;i++)

scanf("%d",&b[i]);

printf("Arrays before swapping");

printf("\nFirst array->");

for(i=0;i<10;i++){

printf("%d",a[i]);

}

printf("\nSecond array->");

for(i=0;i<10;i++){

printf("%d",b[i]);

}

for(i=0;i<10;i++){

//write any swapping technique

c[i]=a[i];

a[i]=b[i];

b[i]=c[i];

}

printf("\nArrays after swapping");

printf("\nFirst array->");

for(i=0;i<10;i++){

printf("%d",a[i]);

}

printf("\nSecond array->");

for(i=0;i<10;i++){

printf("%d",b[i]);

}

return 0;

}

SWAP TWO VARIABLES WITHOUT USING THIRD USING C PROGRAM VARIABLE

2011-06-10T11:35:00.001+05:30

#include<stdio.h>

int main(){

int a,b;

printf("\nEnter two numbers:");

scanf("%d %d",&a,&b);

printf("\nBefore swapping a=%d b=%d",a,b);

a=a^b;

b=b^a;

a=a^b;

printf("\nAfter swapping a=%d b=%d",a,b);

return 0;

}

Swapping of two number

#include<stdio.h>

int main(){

int a=5,b=10;

//process one

a=b+a;

b=a-b;

a=a-b;

printf("a= %d b= %d",a,b);

//process two

a=5;

b=10;

a=a+b-(b=a);

printf("\na= %d b= %d",a,b);

//process three

a=5;

b=10;

a=a^b;

b=a^b;

a=b^a;

printf("\na= %d b= %d",a,b);

//process four

a=5;

b=10;

a=b-~a-1;

b=a+~b+1;

a=a+~b+1;

printf("\na= %d b= %d",a,b);

//process five

a=5,

b=10;

a=b+a,b=a-b,a=a-b;

printf("\na= %d b= %d",a,b);

getch();

}

SWAP TWO VARIABLES WITHOUT USING THIRD USING C PROGRAM VARIABLE

2011-06-10T11:33:00.000+05:30

SWAP TWO VARIABLES WITHOUT USING THIRD USING C PROGRAM VARIABLE

#include<stdio.h>

int main(){

int a,b;

printf("\nEnter two numbers:");

scanf("%d %d",&a,&b);

printf("\nBefore swapping a=%d b=%d",a,b);

a=a^b;

b=b^a;

a=a^b;

printf("\nAfter swapping a=%d b=%d",a,b);

return 0;

}

Swapping of two number

#include<stdio.h>

int main(){

int a=5,b=10;

//process one

a=b+a;

b=a-b;

a=a-b;

printf("a= %d b= %d",a,b);

//process two

a=5;

b=10;

a=a+b-(b=a);

printf("\na= %d b= %d",a,b);

//process three

a=5;

b=10;

a=a^b;

b=a^b;

a=b^a;

printf("\na= %d b= %d",a,b);

//process four

a=5;

b=10;

a=b-~a-1;

b=a+~b+1;

a=a+~b+1;

printf("\na= %d b= %d",a,b);

//process five

a=5,

b=10;

a=b+a,b=a-b,a=a-b;

printf("\na= %d b= %d",a,b);

getch();

}

Logic of HCF or GCD of any two numbers:

2011-06-10T11:30:00.001+05:30

In HCF we try to find any largest number which can divide both the number.

For example: HCF or GCD of 20 and 30

Both number 20 and 30 are divisible by 1, 2,5,10.

HCF=max (1, 2, 3, 4, 10) =10

Logic for writing program:

It is clear that any number is not divisible by more than that number. In case of more than one number s, a possible maximum number which can divide all of the number s must be minimum of all of that numbers.

For example: 10, 20, and 30

Min (10, 20, 30) =10 can divide all there numbers. So we will take one for loop which will start form min of the numbers and will stop the loop when it became one, since all numbers are divisible by one. Inside for loop we will write one if conditions which will check divisibility of both the numbers.

Write a c program to find out H.C.F. of two numbers.

2011-06-10T11:29:00.001+05:30

#include<stdio.h>

int main(){

int x,y,m,i;

printf("Insert any two number: ");

scanf("%d%d",&x,&y);

m=x

for(i=m;i>=1;i--){

if(x%i==0&&y%i==0){

printf("\nHCF of two number is : %d",i) ;

break;

}

return 0;

}