Apr 13, 2012

C Program to check matrix is magic square or not.

Write a c program to check whether the given matrix is a  magic square matrix or not?
The matrix is magic  square matrix, if all rows sum, columns sum and diagonals sum must be equal. Example:

8   1   6
3   5   7 
4   9   2      is the magic square matrix. Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.




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#include <stdio.h>
#include<conio.h>
void main()
{
    int A[10][10];
    int i, j=0, M,N;
    int size;
    int sum,sum1,sum2;
    int flag=0;
    
    clrscr();
    
    printf("Enter the order of the matrix:\n");
    scanf("%d %d", &M, &N);
    if(M==N){
        printf("Enter the elements of matrix \n");
        for(i=0; i<M; i++)
        {
            for(j=0; j<N; j++)
            {
                scanf("%d",&A[i][j]);
            }
        }
        
        printf("\n\nMATRIX  is\n");
        for(i=0; i<M; i++)
        {
            for(j=0; j<N; j++)
            {
                printf("%3d\t",A[i][j]);
            }
            printf("\n");
        }
        
        
        sum=0;
        for(i=0;i<M;i++)
        for(j=0;j<N;j++)
        {
            if(i==j)
            sum=sum+A[i][j];
        }
        
        
        for(i=0;i<M;i++)
        {
            sum1=0;
            {
                for(j=0;j<N;j++)
                sum1=sum1+A[i][j];
            }
            if(sum==sum1)
            flag=1;
            else
            {
                flag=0;
                break;
            }
        }
        
        for(i=0;i<M;i++)
        {
            sum2=0;
            for(j=0;j<N;j++)
            {
                sum2=sum2+A[j][i];
            }
            if(sum==sum2)
            flag=1;
            else
            {
                flag=0;
                break;
            }
        }
        
        if(flag==1)
        printf("\n\n The given Matrix is a Magic square matrix\n\n");
        else
        printf("The given Matrix is NOT a  Magic square matrix\n\n");
    } else
    {
        printf("\n\nPlease enter the square matrix order(m=n)\n\n");
    }
}
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Apr 11, 2012

C Program to delete vowels in a string.

C Strings:
Write a C Program to delete a vowel in a given string.
In this program, We use the pointers to position the characters.check_vowel() function checks the character is vowel or not, if the character is vowel it returns true else false.
Example output:Given string: Check vowel
Output is: Chck vwl
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.



/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<conio.h>
#define TRUE 1
#define FALSE 0

int check_vowel(char);

main()
{
    char string[100], *temp, *pointer, ch, *start;
    csrcscr();
    printf("\n\nEnter a string\n");
    scanf("%s",string);
    temp = string;
    pointer = (char*)malloc(100);
    
    if( pointer == NULL )
    {
        printf("Unable to allocate memory.\n");
        exit(EXIT_FAILURE);
    }
    
    start = pointer;
    
    while(*temp)
    {
        ch = *temp;
        
        if ( !check_vowel(ch) )
        {
            *pointer = ch;
            pointer++;
        }
        temp++;
    }
    *pointer = '\0';
    
    pointer = start;
    strcpy(string, pointer); /* If you wish to convert original string */
    free(pointer);
    
    printf("String after removing vowels is \"%s\"\n", string);
    
    return 0;
}

int check_vowel(char a)
{
    if ( a >= 'A' && a <= 'Z' )
    a = a + 'a' - 'A';
    
    if ( a == 'a' || a == 'e' || a == 'i' || a == 'o' || a == 'u')
    return TRUE;
    
    return FALSE;
}
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