Hi
How can i define a 2d array without giving the size of it
i want the user to enter the size
please can somone tell me how?
Code:
#include<stdio.h>
int main(){
int arow,acol,brow,bcol,crow,ccol;
int i,j,m,k;,
int a[arow][acol],b[brow][bcol],c[crow][ccol]; // error occur here
printf("Enter the first matrix row and column size\n");
scanf("%d%d",&arow,&acol);
printf("Enter the second matrix row and column size\n");
printf("(column size must have the same size of row size of the first matrix)\n");
scanf("%d%d",&brow,&bcol);
if(arow!=bcol)
printf("Cannot perform the multiplication\n");
else{
crow=arow;
ccol=bcol;
printf("Enter the first matrix elements\n");
for(i=0;i<arow;i++)
for(j=0;j<acol;j++)
scanf("%d",&a[i][j]);
for(i=0;i<brow;i++)
for(j=0;j<bcol;j++)
scanf("%d",&b[i][j]);
for(i=0;i<crow;i++)
for(j=0;j<ccol;j++)
for(k=0; k<acol;k++){
m=a[i][k]*b[k][j];
c[i][j]+=m;}
}
return 0; }