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Saturday, 7 July 2012


IGNOU Practicle Question






C code to print or display lower triangular matrix


#include<stdio.h>
int main(){
  int a[3][3],i,j;
  float determinant=0;
  printf("Enter the 9 elements of matrix: ");
  for(i=0;i<3;i++)
      for(j=0;j<3;j++)
           scanf("%d",&a[i][j]);
  printf("\nThe matrix is\n");
  for(i=0;i<3;i++){
      printf("\n");
      for(j=0;j<3;j++)
           printf("%d\t",a[i][j]);
  }
   printf("\nSetting zero in upper triangular matrix\n");
   for(i=0;i<3;i++){
      printf("\n");
      for(j=0;j<3;j++)
           if(i<=j)
             printf("%d\t",a[i][j]);
           else
             printf("%d\t",0);
  }
   return 0;
}
Enter the 9 elements of matrix: 1
2
3
4
5
6
7
8
9
The matrix is
1       2       3
4       5       6
7       8       9
Setting zero in upper triangular matrix
1       2       3
0       5       6
0       0       9




C code to print or display upper triangular matrix


#include<stdio.h>
int main(){
  int a[3][3],i,j;
  float determinant=0;
  printf("Enter the 9 elements of matrix: ");
  for(i=0;i<3;i++)
      for(j=0;j<3;j++)
           scanf("%d",&a[i][j]);
  printf("\nThe matrix is\n");
  for(i=0;i<3;i++){
      printf("\n");
      for(j=0;j<3;j++)
           printf("%d\t",a[i][j]);
  }
   printf("\nSetting zero in upper triangular matrix\n");
   for(i=0;i<3;i++){
      printf("\n");
      for(j=0;j<3;j++)
           if(i>=j)
             printf("%d\t",a[i][j]);
           else
             printf("%d\t",0);
  }
   return 0;
}
Sample output:
Enter the 9 elements of matrix: 1
2
3
4
5
6
7
8
9
The matrix is
1       2       3
4       5       6
7       8       9
Setting zero in upper triangular matrix
1       0       0
4       5       0
7       8       9



Matrix addition in c language


C code:

#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;
}




Alogrithm:


Addition of two matrixes:
Rule: Addition of two matrixes is only possible if both matrixes are of same size.
Suppose two matrixes A and B is of same size m X n
Sum of two marixes is defined as
(A + B)ij  = Aij + Bij
Where 1 i  m and 1 ≤ j  n
For example:
Suppose two matrixes A and B of size of 2 X 3 is as follow:

1. C code for matrix multiplication

2. C program for matrix multiplication

3. Write a program for matrix multiplication in c

4. How to multiply two matrixes in c
5. Matrix multiplication program in c language
6. Matrix multiplication in c using array



#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;
}




Alogrithm:


Multiplication of two matrixes:
Rule: Multiplication of two matrixes is only possible if first matrix has size m X n and other matrix has size n x r. Where m, n and r are any positive integer.
Multiplication of two matrixes is defined as







Where 1 i  m and 1 ≤ j  n
For example:
Suppose two matrixes A and B of size of 2 x 2 and 2 x 3 respectively:

































C PROGRAME TO VOWELLESS STRING


#include<stdio.h>
#include<string.h>
void main()
{
 int length=0,i,j=0;
 char str[50], new_str[30];
 clrscr();
 printf("Please enter the string:-");
 gets(str);
 for(i=0;i<=strlen(str);i++)
 {
  if((str[i]=='a'|| str[i]=='e'|| str[i]=='i'|| str[i]=='o'|| str[i]=='u'|| str[i]=='A'|| str[i]=='E'|| str[i]=='I'|| str[i]=='O'|| str[i]=='U'
    ))
      {
      str[i]=' ' ;
      }
      else
      {
      length++;
      new_str[j++]=str[i];
      }
      }
      new_str[i]='\o';
      printf("new vowel less string :-%s",new_str);
      printf("\nlength of string is:=%d",length);
      getch();
      }



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