C Tutorial/Array/Two dimensional array
Transpose of a matrix
<source lang="cpp">#include<stdio.h>
- include<conio.h>
- define ROW 3
- define COL 3
void dis(int a[][COL],int,int); void trans(int a[][COL],int,int); void main() {
int a[ROW][COL];
a[0][0] = 1; a[0][1] = 2; a[0][2] = 3;
a[1][0] = 4; a[1][1] = 5; a[1][2] = 6;
a[2][0] = 7; a[2][1] = 8; a[2][2] = 9;
printf("\nThe matrix is \n");
dis(a,ROW,COL);
trans(a,ROW,COL);
printf("The tranpose of the matrix is\n");
dis(a,ROW,COL);
getch();
} void dis(int d[3][3 ],int i,int k) {
int j,l;
for(j=0;j<i;j++)
{
for(l=0;l<k;l++)
printf("%d ",d[j][l]);
printf("\n");
}
} void trans(int mat[][3],int k ,int l) {
int i,j,temp;
for(i=0;i<k;i++)
for(j=i+1;j<l;j++)
{
temp=mat[i][j];
mat[i][j]=mat[j][i];
mat[j][i]=temp;
}
}</source>
The matrix is 1 2 3 4 5 6 7 8 9 The tranpose of the matrix is 1 4 7 2 5 8 3 6 9
Two-dimensional array
<source lang="cpp">#include <stdio.h> main(){
int a[3][2];
int i,j;
for(i = 0;i<3;i++){
for(j=0;j<2 ;j++) {
a[i][j]=2;
}
}
for(i = 0;i<3;i++){
for(j=0;j<2;j++) {
printf("value in array %d\n",a[i][j]);
}
}
for(i = 0;i<3;i++){
for(j=0;j<2;j++){
printf("value in array %d and address is %8u\n", a[i][j],&a[i][j]);
}
}
}</source>
value in array 2
value in array 2
value in array 2
value in array 2
value in array 2
value in array 2
value in array 2 and address is 631648
value in array 2 and address is 631652
value in array 2 and address is 631656
value in array 2 and address is 631660
value in array 2 and address is 631664
value in array 2 and address is 631668
