How to write a C Program to Check Two Matrices are Equal or Not. Or How to write a C program to check whether two Multi-Dimensional Arrays are equal or not with example.
C Program to Check Two Matrices are Equal or Not
This program allows the user to enter the number of rows and columns of two Matrices. Next, C Program will check whether those two matrices are equal or not.
/* C Program to Check Two Matrices are Equal or Not */
#include<stdio.h>
int main()
{
int i, j, rows, columns, a[10][10], b[10][10], isEqual;
printf("\n Please Enter Number of rows and columns : ");
scanf("%d %d", &i, &j);
printf("\n Please Enter the First Matrix Elements\n");
for(rows = 0; rows < i; rows++)
{
for(columns = 0;columns < j;columns++)
{
scanf("%d", &a[rows][columns]);
}
}
printf("\n Please Enter the Second Matrix Elements\n");
for(rows = 0; rows < i; rows++)
{
for(columns = 0;columns < j;columns++)
{
scanf("%d", &b[rows][columns]);
}
}
isEqual = 1;
for(rows = 0; rows < i; rows++)
{
for(columns = 0;columns < j;columns++)
{
if(a[rows][columns] != b[rows][columns])
{
isEqual = 0;
break;
}
}
}
if(isEqual == 1)
{
printf("\n Matrix a is Equal to Matrix b");
}
else
{
printf("\n Matrix a is Not Equal to Matrix b");
}
return 0;
}
In this C program, We declared Two dimensional arrays a, b of size 10 * 10. Below statements asks the User to enter the Matrices a, b sizes (Number of rows and columns. For instance 2 Rows, 2 Columns = a[2][2] and b[2][2])
printf("\n Please Enter Number of rows and columns : ");
scanf("%d %d", &i, &j);
Next, we used for loop to iterate each cell present in a[2][2] matrix. Conditions inside the C for loops ((rows < i) and (columns < j)) will ensure the C Programming compiler, not to exceed the C Matrix limit. Otherwise, the matrix will overflow
scanf statement inside the for loop will store the user entered values in every individual array element such as a[0][0], a[0][1], a[1][0], a[1][1]
for(rows = 0; rows < i; rows++).
{
for(columns = 0; columns < j; columns++)
{
scanf("%d", &a[rows][columns]);
}
}
Next, for Loop is to store user-entered values into b[2][2] matrix.
In the next line, We have one more for loop to check the array elements are equal or not.
for(rows = 0; rows < i; rows++)
{
for(columns = 0;columns < j; columns++)
{
if(a[rows][columns] != b[rows][columns])
{
isEqual = 0;
break;
}
}
}
The user inserted values for this C Program to Check Two Matrices are Equal or Not are
a[2][2] = {{1, 2}, { 3, 4}}
b[2][2] = {{1, 2}, { 3, 4}}
IsEqual = 1
Row First Iteration: for(rows = 0; rows < 2; 0++)
The condition (0 < 2) is True. So, it will enter into second for loop
Column First Iteration: for(columns = 0; 0 < 2; 0++)
The condition (columns < 2) is True. So, it will enter into the C If Statement.
if(a[rows][columns] != b[rows][columns]) => if(a[0][0] != b[0][0] ).
It means, if(1 != 1) – The condition is False. So, it will exit from If statement without executing statements inside the If block.
Column Second Iteration: for(columns = 1; 1 < 2; 1++)
The condition (1 < 2) is True.
if(a[0][1] != b[0][1] ) => if(2 != 2) – The condition is False so, it will exit from If statement
Next, column value will increment. After the increment, the condition inside the second for loop (columns < 2) will fail. So it will exit from the loop.
Now the value of rows will increment and become 1
Row Second Iteration: for(rows = 1; 1 < 2; 1++) // Still IsEqual = 1
The condition (1 < 2) is True. So, it will enter into second for loop
Column First Iteration: for(columns = 0; 0 < 2; 0++)
The condition (columns < 2) is True. So, it will enter into the If Statement.
if(a[1][0] != b[1][0] ) => if(3 != 3) – The condition is False so, it will exit from If statement
Column Second Iteration: for(columns = 1; 1 < 2; 1++)
The condition (1 < 2) is True.
if(a[1][1] != b[1][1] ) => if(4 != 4) – condition is False. So, it will exit from If statement
column value will be incremented. After the increment, the condition inside the second for loop (columns < 2) will fail. So it will exit from the loop.
Next, rows value will become 3. So, the condition inside the for loop (3 < 2) fails. So it will exit from the loop.
At last, we used if(isEqual == 1). If the condition is True, then Matrix A is Equal to B. Otherwise, they are not equal.
Let me try with Wrong values
Please Enter Number of rows and columns : 2 2
Please Enter the First Matrix Elements
1 2
3 4
Please Enter the Second Matrix Elements
1 3
3 4
Matrix a is Not Equal to Matrix bAlso Read