Thread: short matrix problem

In this program I only input the number of columns and the entries of the matrix. The program then determines the number of rows. The program works perfectly for the correct number of entries like 4 entries for a 2 by 2 matrix. However it doesnt work for 3 entries for a 2 by 2 matrix. Please reply fast

Code:

Code:

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


int  main()
{
  int m,x, n, c = 0, d,k, matrix[10][10], transpose[10][10], product[10][10];


  printf("Enter the number of columns of matrix ");
  scanf("%d",&m);
  if(m<=0){
    printf("You entered a invalid value.");
    exit(0);
  }
  else{
    printf("Enter the elements of matrix \n");


    for( c = 0 ; c < 10 ; c++ )
      {
        for( d = 0 ; d < m ; d++ )
          {
            scanf("%d",&matrix[c][d]);
            if (matrix[c][d] == 99) // 99 is  variable I declared to use as a break
           break;




          }
        if (matrix[c][d] == 99)
          break;
      }
  }


  printf("\nHere is your matrix:\n");
  int i;


  for(i=0;i<c;i++)
    {
      for(d=0;d<m;d++)
        {


 printf("%3d ",matrix[i][d]);
        }
printf("\n");
    }

sorry
i was just getting tensed since ive bin working on this for ages and i cant get any ideas

it does work if i put 3 entries but not the way it shoud like itll give me garbage values.

u miss fflush()... u need to clear ur buffer rite after input from user else ur next scanf will still take ur previous entered number as input(in the case that next scanf very close together)


question for u: are u on a open book test or something?

no im not i just have this due in a couple of hours.

Could u elaborate? ive neve rused fflush

Okay I have an idea I just dont know how to quite put it down. If the user doesnt enter m*n entries then the program should just exit
kindof like this

Code:

 if(m*c%m != 0){
            printf("NO");
            exit(0);
          }
            else{
print

Originally Posted by oogabooga

Why haven't you answered laserlight's or TheBigH's questions?

Neko Tan doesn't know what it's talking about. fflush is not needed.

Indent your code properly. Look at post #7. Is that really how you mean your code to look?

maybe this happen only on my compiler... it seem like stuck on 2nd scanf (if without fflush)...

i had one last question sorry to annoy you so much today
i want the program to exit if the user inputs a value in the matrix less than 0. i plan on writing it like

Code:

if(matrix[c][d] < 0){
printf("not valid number");
exit(1);}

but ive been trying this for a while but i cant seem to understand where exactly in the code i should put it
ive tired numerous times but nothing has worked out

The transpose is right its just the multiplication of the matrix and transpose sometimes comes wrong

sorry about the indentation

I did reply to laserlight.
Look im just trying to brainstorm i want the matrix to be a m*n matrix.
i want my code to exit if the user doesnt enter m*n values.
Could you please give me some direction?
Im waitng here