Two Dimensional Array - PTInstitute

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TWO DIMENSIONAL ARRAY
By Professional Training Institute

• Professional Embedded Training Institute in
  Bangalore

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TWO DIMENSIONAL
ARRAY

• We have introduced array as if we want to save a
  hundred values then its difficult to declare
  variables, so we used array .now if we want
  hundred such arrays then we can have
  two-dimensional arrays .so an array of arrays is
  known as 2d array. Through our website you can
  learn more.

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1.1 PROGRAM TO CHECK WHETHER THE TWO(33)
MATRICES ARE EQUAL OR NOT
DESCRIPTION

• First we taken the two(33) matrixes, afterwards
  we need to check that all elements inside the two
  matrices are equal or not in both matrices with
  respect to position wise also, if all elements
  with respect to position in two matrices are
  equal then prints both matrices are EQUAL
  otherwise prints both matrixes are not equal.

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• for(i0ilt3i) //loop for checking whether two
  matrixes are equal or not
• for(j0jlt3j)
• if(matrix1ij!matrix2ij)
• count// increment the count value if the
  elements are not
• equal
• if(count0)
• printf(2 matrixes are equal\n)
• else
• printf(2 matrixes are not equal\n)

• includeltstdio.hgt
• int main()
• int matrix133,matrix233,i,j,count0
• printf(enter the elements of first 33
  matrix\n)
• for(i0ilt3i) //rows
• for(j0jlt3j)// columns
• scanf(d,matrix1ij) //input from the user
• printf(enter the elements of second 33
  matrix\n)
• for(i0ilt3i)
• for(j0jlt3j)
• scanf(d,matrix2ij)

• 10 mins

• 15 mins

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1.2 TO PERFORM SCALAR MULTIPLICATION OF(33)
MATRIX
DESCRIPTION

• Here we can multiply any constant element with
  the 33 matrix(or any other matrix).first user
  ask the input for matrix along with the constant
  variable.

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• scanf(d,matrixij)
• printf(enter the constant element to multiplied
  with the matrix\n)
• scanf(d,constant)
• for(i0iltrowi)
• //loop for multiplying a constant with the given
  matrix
• for(j0jltcolj)
• matrix1ijconstantmatrixij
• printf(the new matrix is\n)
• for(i0iltrowi)
• //loop for printing the multiplied matrix

• includeltstdio.hgt//preprocessor directive with
  header file
• int main()
• int matrix1010,i,j,n,constant,row,col,matrix1
  1010
• printf(enter the number of rows of the array
  elements\n)
• scanf(d,row)
• printf(enter the number of columns of the array
  elements\n)
• scanf(d,col)
• printf(enter the matrix elements\n)
• for(i0iltrowi)
• //for row elements
• for(j0jltcolj)
• //for column elements

• 10 mins

• 15 mins

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• for(j0jltcolj)
• printf( d,matrix1ij)
• printf(\n)
• //end of main function

• 10 mins

• 15 mins

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1.3 TO FIND THE SUM OF EACH ROW AND COLUMN OF A
33 MATRIX
DESCRIPTION

• First, We have to take(33) matrix,then we need
  to find the sum of each elements of the
  row1,afterwards sum of each elements of row2 and
  then row3, similar method is needed to find the
  sum of each elements of columns also afterwards
  print all the sums individually.

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• includeltstdio.hgt
• int main()
• int matrix33,i,j,sum,row0,sum1
• printf(enter the elements of the
  matrix(33)\n)
• for(i0ilt3i)// scanning for rows
• for(j0jlt3j)// scanning for columns
• scanf(d,matrixij)
• for(i0ilt3i)//loop for finding the sum of
  each rows and columns
• sum0
• sum10

• for(j0jlt3j)
• sumsummatrixij//sum is sum of each rows
• sum1sum1matrixji//sum1 is sum of each
  columns
• printf(sum of rowdd\n,row,sum)//printing
  sum of each rows value
• printf(sum of columndd\n,row,sum1)//printing
  sum of each
• column value
• row

• 10 mins

• 15 mins

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1.4 MULTIPLICATION OF TWO 33 MATRIX
DESCRIPTION

• First we take the two 33 matrixes(or any),
  afterwards we need to check the rows of the first
  matrix is equal to the columns of the second
  matrix, if it is satisfied then only you to
  process for further steps otherwise print no
  multiplication is possible,if it is satisfied
  then only multiply 2 matrix.

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• includeltstdio.hgt
• int main()
• int matrix133,matrix233,matrix333,row1
  ,col1,row2,col2,i,j,k,mul
• printf(enter the number of rows of the first
  matrix\n)
• scanf(d,row1)
• printf(enter the columns of the first
  matrix\n)
• scanf(d,col1)
• printf(enter the elements of the first
  matrix\n)
• for(i0iltrow1i)
• for(j0jltcol1j)

• scanf(d,matrix1ij)
• printf(enter the number of rows of second
  matrix\n)
• scanf(d,row2)
• printf(enter the number of columns of second
  matrix\n)
• scanf(d,col2)
• if(row1!col2) //if rows of the 1st matrix not
  equal to second matrix exit program
• otherwise continue
• printf(multiplication not possible\n)
• else

• 10 mins

• 15 mins

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• printf(enter the elements of the second
  matrix\n)
• for(i0iltrow2i)
• for(j0jltcol2j)
• scanf(d,matrix2ij)
• printf(multiplication of two matrix is\n)
• for(i0iltrow1i) // matrix multiplication
  takes place
• for(j0jltcol2j)

• mul0
• for(k0kltcol1k)
• mulmulmatrix1ikmatrix2kj
• printf( d,mul)
• printf(\n)

• 10 mins

• 15 mins

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1.5 PROGRAM TO STORE 10 NAME INTO 2D ARRAY AND
PRINT THEM
DESCRIPTION

• We declare a 2 dimensional character array of
  required size,afterwards we need to store names,
  and print them.

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• includeltstdio.hgt
• int main()
• char names2020
• int row,col,i,j
• printf(enter the rows and columns of the 2d
  array\n)
• scanf(d d,row,col)
• printf(enter the names you want to print\n)
• for(i0iltrowi)
• scanf(s,namesi0)//user input to store
  names

• for(i0iltrowi)
• printf(s\n,namesi0)//printing the names

• 10 mins

• 15 mins

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1.6 PROGRAM TO SWAP THE TWO ARRAYS
DESCRIPTION

• To swap two strings in c programming we want to
  ask user to enter two strings and then make a
  temporary variable of same type and then place
  elements of string 1 in temp and and elements of
  string 2 in 1 and then temp in string 2.

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• includeltstdio.hgt
• int main()
• char array110,array210,temp10\0?
• int len10,len20,i,j
• printf(enter the elements of the first
  array\n)
• scanf(s,array1)
• printf(enter the elements of the second
  array\n)
• scanf(s,array2)
• while(array1len1!\0')//loop for calculating
  the length of the first array
• len1

• printf(the length of the first array is
  d\n,len1)
• while(array2len2!\0')//loop for calculating
  the length of the second array
• len2
• printf(the length of the second array is
  d\n,len2)
• for(i0iltlen1i)//using temporary variable we
  swap the 2 given arrays and
• print after the swapping process
• tempiarray1i

• 10 mins

• 15 mins

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• printf(c,array2j)

• for(i0iltlen2i)
• array1iarray2i
• for(i0iltlen1i)
• array2itempi
• for(i0iltlen2i)
• printf(c,array1i)
• printf(\n)
• for(j0jltlen1j)

• 10 mins

• 15 mins

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1.7 PROGRAM TO CHECK WHETHER THE GIVEN STRING IS
PALINDROME OR NOT
DESCRIPTION

• A string is palindrome if the reverse of that
  string is equal to original string.firstly we
  need to declare a character array of some size,
  after we need to obtain input string from the
  user, and take another array and copy the
  reversing order of first string and compare the
  both strings if it is equal print as the given
  string is palindrome else print the given string
  is not an palindrome.

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• includeltstdio.hgt
• includeltstring.hgt
• int main()
• char str10,rev10\0?
• int length0,i,j
• printf(enter the string\n)
• scanf(s,str)
• while(strlength!\0')
• length
• printf(length of the string isd\n,length)
• for(ilength-1,j0igt0,jltlengthi,j)/for
  loop for reversing a original string and store it
  inanother character array/

• revistrj
• for(i0iltlengthi)//comparing original string
  with the reversing string
• if(revistri)
• j1
• else
• j0
• if(j1)
• printf(palindrome\n)
• else
• printf(not an palindrome\n)

• 10 mins

• 15 mins

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1.8 PROGRAM TO INTERCHANGING THE DIAGONALS OF
MATRIX
DESCRIPTION

• Firstly we take the matrix (only square
  matrix),afterwards we need to interchange the
  left diagonal elements towards right and
  vice-versa and print the result of interchanging
  the diagonal elements.

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• includeltstdio.hgt
• int main()
• int a1010,row,column,i,j,temp
• printf(enter the number of rows and columns of
  the matrix\n)
• scanf(d d,row,column)
• printf(enter the elements of the matrix\n)
• for(i0iltrowi)
• for(j0jltcolumnj)
• scanf(d,aij)
• for(i0iltrowi)

• tempaii
• aiiairow-i-1
• airow-i-1temp
• for(i0iltrowi)
• for(j0jltcolumnj)
• printf( d,aij)
• printf(\n)

• 10 mins

• 15 mins

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1.9 WRITE A PROGRAM TO PRINT UPPER TRIANGULAR
MATRIX
DESCRIPTION

• We have to take one square matrix and print the
  upper triangular matrix only remaining the term
  should be zero or empty.

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• matrixrowcolumnmatrixrowcolumn//assign
  the elements as it is if column is
• greater or equal,else it is 0
• else
• matrixrowcolumn0
• for(row0rowlt3row)
• for(column0columnlt3column)
• printf( d,matrixrowcolumn)
• printf(\n)

• includeltstdio.hgt
• int main()
• int matrix33,row,column
• printf(enter the (33) matrix elements\n)
• for(row0rowlt3row)
• for(column0columnlt3column)
• scanf(d,matrixrowcolumn)
• for(row0rowlt3row)
• for(column0columnlt3column)
• if(columngtrow)

• 10 mins

• 15 mins

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