count the array elements

Write a C Program to count the array elements

#include<conio.h>

#include<stdio.h>

void main()

{

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

clrscr();

printf("enter array elements=");

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

{

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

}

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

{

c++;

}

printf("counting elements of an array is:%d",c);

getch();

}

Program Coded by: Ashish Garg, Patiala (India)

Subtraction of Two Matrices

C Program for subtraction of two matrices 

#include<stdio.h>
#include<conio.h>

//Read Matrix
void read_mat(float a[][10],int m,int n)
{
int i,j;
printf("\n\nEnter %d X %d matrix below:\n",m,n);
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%f",&a[i][j]);
}

//Write Matrix
void write_mat(float a[][10],int m,int n)
{
int i,j;
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%10.2f",a[i][j]);
printf("\n");
}
}

//Subtract matrices
void sub_mat(float a[][10],float b[][10],float c[][10],int m,int n)
{
int i,j;
for(i=0;i<m;i++)
for(j=0;j<n;j++)
c[i][j]=a[i][j] - b[i][j];
}

//main function
void main()
{
float x[10][10],y[10][10],z[10][10];
int m,n;
clrscr();

//Accept two matrices
printf("\n\nEnter order of matrix \n");
scanf("%d %d",&m,&n);
read_mat(x,m,n);
read_mat(y,m,n);

//call sub_mat() function
sub_mat(x,y,z,m,n);
printf("\n\nSUBTRACTION OF THE GIVEN MATRICES IS:\n");
write_mat(z,m,n);
getch();
}

Find Inverse of a Given Matrix

Write a Program to find inverse of a given matrix

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<math.h>

//Read Matrix
void read_mat(float a[][10],int n)
{

int i,j;
printf("\n\nEnter %d X %d matrix below:\n",n,n);
for(i=0;i<n;i++)
for(j=0;j<n;j++)
scanf("%f",&a[i][j]);

}

//Write Matrix
void write_mat(float a[][10],int n)
{
int i,j;
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
printf("%10.2f",a[i][j]);
printf("\n");
}
}

//Swap Rows
void swap_rows(float a[][10],int n,int i,int j)
{
int k,temp;
for(k=0;k<n;k++)
{
temp=a[i][k];
a[i][k]=a[j][k];
a[j][k]=temp;
}
}

//Multiplication of rows
void row_mult(float a[][10],int n,int i,float x)
{
int k;
for(k=0;k<n;k++)
a[i][k]*=x;
}

// Subtraction of rows
void row_sub(float a[][10],int n,int i,int j,float x)
{
int k;
for(k=0;k<n;k++)
a[j][k]-=x*a[i][k];
}

//Inverse of matrix
void inverse(float a[][10],float ia[][10],int n)
{
int i,j;
for(i=0;i1.0e-6)
break;
if(j==n)
{
printf("Inverse does not exist");
getch();
exit(0);
}
swap_rows(a,n,i,j);
swap_rows(ia,n,i,j);
}
row_mult(ia,n,i,1/a[i][i]);
row_mult(a,n,i,1/a[i][i]);
for(j=0;j<n;j++)
if(i!=j)
{
row_sub(ia,n,i,j,a[j][i]);
row_sub(a,n,i,j,a[j][i]);
}
}
}

//main function
void main()
{
float a[10][10],b[10][10];
int n;
clrscr();

//Accept Matrix
printf("\n\nEnter order of the square matrix \n");
scanf("%d",&n);
read_mat(a,n);

//inverse the matrix
inverse(a,b,n);
printf("\n \nInverse of the given square matrix is : \n");
write_mat(b,n);
getch();
}

Factorial off a number using "do while" loop

#include<stdio.h>
#include<conio.h>
void main()
{
int n,f=1;
clrscr();
printf("enter any number=");
scanf("%d",&n);
do
{
f=f*n;
n--;
}
while(n>0);
printf("factorial number is=%d",f);
getch();
}
Courtesy: Ashish Garg
Patiala, India

Add numbers using command line arguments (CLA)

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>

void main(int argc,char *argv[])
{
int sum=0,i;
//Compare if proper number of arguments have been entered
if(argc<3)
{
printf("Insufficient number of arguments:\n");
getch();
return 0;
}

//Add all the numbers entered using atoi function
for(i=1;i<argc;i++)
{
sum+=atoi(argv[i]);
}

//print the sum
printf("Ans=%d",sum);
getch();
}

Factorial of Number Using While Loop

#nclude <stdio.h>
#include <conio.h>
void main()
{
int i=1,n,fact=1;
clrscr();
printf("enter a number");
scanf("%d",&n);
while(i<=n)
{
fact=fact*i;
printf("%d",i);
i++;
}
printf("fact=%d",fact);
getch();
}

Multiply and swap 2 nmbers using bitwise operators

#include<stdio.h>
#include<conio.h>
void main(void)
{
int a,b;
clrscr();
printf("Input value of A: ");
scanf("%d",&a);
printf("Input value of B: ");
scanf("%d",&b);
a=a^b;
b=b^a;
a=b^a;
printf("After Swapping:\n");
printf("Value of A: %d",a);
printf("\nValue of B: %d",b);
getch();
}

Wap to reverse words

‎#include <stdio.h>
#include <conio.h>
#include <string.h>
const int opt = 50;
int main(){
int i=0,j=0,c=0,vali[opt] = {0};
char str1[opt],str2[opt]="",str3[opt]="",ch;
printf("please enter your sentence :");
gets(str1);
for(i=0;str1[i] != '\0';i++){
if(str1[i] == ' '){
vali[j+1] = i;
j++;
}
}
c = j;
for(i=0;i<=j && c!=0;i++){
strcat(str2,&str1[vali[c]+1]);
strcpy(&str1[vali[c]],str3);
strcat(str2," ");
c--;
}
strcat(str2,str1);
printf("\nyour reversed sentence is :");
puts(str2);
getch();
return 0;
}

Pyramid using nested for loops

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j;
for(i=5;i>=1;i--)
{
for(j=i;j>=1;j--)
{
printf("%d",j);
}
printf("\n");
}
}






OUTPUT


5 4 3 2 1
4 3 2 1
3 2 1
2 1
1

Whether the given no. Is palindrome or not

  #include<stdio.h>
  #include<conio.h>
  void main()
  {
   int n,r,t,sum=0;
   clrscr();
   printf("    OUTPUT:\n");
   printf("\tEnter a no.");
   scanf("%d",&n);
   t=n;
   while(n!=0)
{
r=n%10;
sum=sum*10+r;
n=n/10;
}
   if(sum==t)
   printf("\tThe no. %d is a pallindrome",t);
   else
   printf("\tThe no. %d is not a pallindrome",t);
   getch();
  }

Whether the given no. is armstrong or not

  #include<stdio.h>
  #include<conio.h>
  void main()
   {
    int n,r,t,sum=0;
    clrscr();
    printf("  OUTPUT :\n");
    printf("\tEnter a no.");
    scanf("%d",&n);
    t=n;
    while(n!=0)
{
r=n%10;
sum=sum+r*r*r;
n=n/10;
}
   if(sum==t)
   printf("The no. %d is armstrong",t);
   else
   printf("The no. %d is not an armstrong",t);
   getch();
  }

Concatenate Two Strings

  #include<stdio.h>

  #include<conio.h>

  #include<string.h>

   void main()

    {

     char c[100];

     char a[50];

     char b[50];

     clrscr();

     printf("Enter a string1:");

     gets(a);

     printf("Enter a string2:");

     gets(b);

     strcat( a,b);

     printf("%s",a);

     getch();

    }

Print Second Largest Among Given Three No.s

  #include<stdio.h>
  #include<conio.h>
  void main()
   {
    int a,b,c;
    clrscr();
    printf("   OUTPUT :\n");
    printf("Enter any three no.s:");
    scanf("%d%d%d",&a,&b,&c);
    if(a>b&&a>c)


if(b>c)
printf("%d is the second largest no.",b);
else
printf("%d is the second largest no.",c);


    if(b>a&&b>c)


if(a>c)
printf("the second largest no. is % d",a);
else
printf(" the second largest no. is %d",c);


    if(c>a&&c>b)


if(b>a)
printf("second largest no. is %d",b);
else
printf("second largest no. is %d",a);


    getch();
   }

Count no. of students above,below and average students

  #include<stdio.h>
  #include<conio.h>
   void main()
    {
     int a[10];
     int aa=0,ba=0,ae=0,i;
     clrscr();
     printf("Enter the marks:\n");
     for(i=0;i<10;i++)
       {
scanf("%d",&a[i]);
if(a[i]>55)
aa++;
else if(a[i]<55)
ba++;
else
ae++;
       }
     printf("No. OF AVG STUDENTS ARE:%d\n",ae);
     printf("No. OF ABOVE AVERAGE STUDENTS:%d\n",aa);
     printf("No. OF BELOW AVERAGE STUDENTS ARE:%d",ba);
    getch();
   }

Print Armstrong numbers Less Than 1000

  #include<stdio.h>
  #include<conio.h>
  void main()
   {
    int q,a,b,c,z,x,n=1;
    clrscr();
    printf("  OUTPUT :");
    while(n<1000)
{
a=n%10;
q=n/10;
b=q%10;
c=q/10;
z=((c*100)+(b*10)+a);
x=(a*a*a)+(b*b*b)+(c*c*c);
if(x==z)
printf("\n\t%d",n);
n++;
}
    getch();
   }

Add Pointers

#include<stdio.h>
#include<conio.h>
 void main()
 {
 int a[10],sum=0;
 int *j;
 int i,n;
 clrscr();
 printf("Enter how many elements u want to add:");
 scanf("%d",&n);
 printf("Enter the elements:");
 for(i=0;i<n;i++)
 {
 scanf("%d",&a[i]);
 }
  j=&a[0];
 for(i=0;i<n;i++)
     {


       sum=sum+*j;
       j++;
     }
 printf("sum=%d",sum);
}

Add two matrices and store the result

#include<stdio.h>
#include<conio.h>
void main()
{
int a[3][3],b[3][3],c[3][3],i,j;
clrscr();
printf("Enter the elements into matrix A\n");
for(i=0;i<3;i++)
for(j=0;j<3;j++)
scanf("%d",&a[i][j]);
printf("\nEnter the elements into matrix B\n");
for(i=0;i<3;i++)
for(j=0;j<3;j++)
scanf("%d",&b[i][j]);
for(i=0;i<3;i++)
for(j=0;j<3;j++)
c[i][j]=a[i][j]+b[i][j];
for(i=0;i<3;i++)
{
printf("\t\t");
for(j=0;j<3;j++)
printf("%d\t",c[i][j]);
printf("\n\a");
}


getch();
}

Find address of char, string, integer

#include<stdio.h>
#include<conio.h>
 main()
  {
   char *chp,*sp;
   int i;
   char ch,s[10];
   int *ip;
   clrscr();
   printf("Enter a char:");
   scanf("%c",ch);
   printf("Enter a string:");
   scanf("%s",s);
   printf("Enter a integer:");
   scanf("%d",&i);
   chp=&ch;
   sp=s;
   ip=&i;
   printf("\nchar\tadd\tstring\t\tstringadd\tint\tint add\n");
   printf("%c\t%u\t%s\t\t%u\t\t%d\t%u",ch,&chp,s,&s,i,&i);
   printf("\nchar pointer value is:%u",chp);
   printf("\nstring pointer value is:%u",sp);
   printf("\nint pointer value is:%u",ip);
   getch();
  }

Print Second Largest Among Given Three No.S

#include<stdio.h>
  #include<conio.h>
  void main()
   {
    int a,b,c;
    clrscr();
    printf("   OUTPUT :\n");
    printf("Enter any three no.s:");
    scanf("%d%d%d",&a,&b,&c);
    if(a>b&&a>c)


if(b>c)
printf("%d is the second largest no.",b);
else
printf("%d is the second largest no.",c);


    if(b>a&&b>c)


if(a>c)
printf("the second largest no. is % d",a);
else
printf(" the second largest no. is %d",c);


    if(c>a&&c>b)


if(b>a)
printf("second largest no. is %d",b);
else
printf("second largest no. is %d",a);


    getch();
   }

Print all permutations of a given string

# include <stdio.h>
# include <conio.h>

/* Function to swap values at two pointers */
void swap (char *x, char *y)
{
    char temp;
    temp = *x;
    *x = *y;
    *y = temp;
}

/* Function to print permutations of string
   This function takes three parameters:
   1. String
   2. Starting index of the string
   3. Ending index of the string. */
void permute(char *a, int i, int n)
{
   int j;
   if (i == n)
     printf("%s\n", a);
   else
   {
        for (j = i; j <= n; j++)
       {
          swap((a+i), (a+j));
          permute(a, i+1, n);
          swap((a+i), (a+j)); //backtrack
       }
   }
}

/* Driver program to test above functions */
int main()
{
   char a[] = "ABC";
   permute(a, 0, 2);
   getchar();
   return 0;
}

C Program find Positive Negative with Switch Case Without Conditional Operator

write a program in c to check whether the given num is Positive or negative using switch case without conditional operator

 ‎#include<stdio.h>
#include<conio.h>
void main(void)
{
char num;
clrscr();
printf("Enter a number +ve or -ve : ");
scanf("%c",&num);
switch(num)
{
case '-':
printf("Negative number");
break;
default:
printf("Positive number");
}
getch();
}

Example of Using Strings in C

Example of Using Strings in C

# include<stdio.h>
# include<conio.h>
# include<string.h>

void main()
{
char *a;
printf("Enter your name=");
gets(a);
printf("%s",a);
getch();

ATM programing

ATM C programing language Program code

 ‎/*Note Pin code is 1234*/
#include<stdio.h>
#include<conio.h>

void main(void)
{ unsigned long amount=1000,deposit,withdr​aw;
int choice,pin=0,k=0;
char another='y';

while(pin!=1234)
{ clrscr();
gotoxy(30,25);
printf("Enter pin:");
scanf("%d",&pin);
}
clrscr();
do
{

printf("********Welcome to ATM Service**************\n");
printf("1. Check Balance\n");
printf("2. Withdraw Cash\n");
printf("3. Deposit Cash\n");
printf("4. Quit\n");
printf("******************​**************************​*\n\n");
printf("Enter your choice: ");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("\nYour Balance is Rs : %lu ",amount);
break;
case 2:
printf("\nEnter the amount to withdraw: ");
scanf("%lu",&withdraw);
if(withdraw%100!=0)
{
printf("\nPlease enter

amount in multiples of 100");
}else if(withdraw>(amount-500))
{

printf("\nInsufficient Funds");
}else
{

amount=amount-withdraw;

printf("\n\nPlease collect cash");

printf("\nYour balance is %lu",amount);
}
break;
case 3:
printf("\nEnter amount to deposit");
scanf("%lu",&deposit);
amount=amount+deposit;
printf("Your balance is %lu",amount);
break;
case 4:
printf("\nThank you for using ATM");
break;
default:
printf("\nInvalid Choice");
}
printf("\n\n\nDo you want another transaction?(y/n): ");
fflush(stdin);
scanf("%c",&another);
if(another=='n'||another==​'N')
k=1;
}while(!k);
printf("\n\nHave a nice day");
getch();

}

Greatest of two numbers using relational conditional operators

program to find greatest of 2 numbers without using relational and conditional operators

‎#include<stdio.h>
#include<conio.h>
#include<math.h>
void main(void)
{
int a,b;
clrscr();
printf("Enter a number: ");
scanf("%d",&a);
printf("Enter another number: ");
scanf("%d",&b);
printf("The greatest number is %d",(a+b+abs(a-b))/2);
getch();
}

how 2 find a given number is positive or negative number in C without using relational and conditional operator

‎# include<stdio.h>
# include<conio.h>
# include<math.h>
void main()
{
clrscr();
int p,n;
printf("Enter two no=");
scanf("%d",&p);
switch(n=abs(p)+(-p))
{
case 0:
{
printf("Positive number");
break;
}
default:
{
printf("Negative number");
break;
}
}
getch();
}

find a given number is positive or negative number in C without if statement, relational and conditional operator

# include <math.h>
# include <stdio.h>
# include <conio.h>
void main()
{
clrscr();
int p,n;
printf("Enter two no=");
scanf("%d",&amp;p);
switch(n=abs(p) +(-p))
{
case 0:
{
printf("Positiv e number");
break;
}
default:
{
printf("Negativ e number");
break;
}
}
getch();
}

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