ZOHO INTERVIEW QUESTION rotate the matrix

#include<stdio.h>

#include<conio.h>

int N,move,n,a[100][100];

void rotate(int index){

int i,temp,temp1;

temp=a[index][index];

for(i=index+1;i<N-index;i++){

     temp1=a[index][i];

     a[index][i]=temp;

     temp=temp1;

}

for(i=index+1;i<N-index;i++){

     temp1=a[i][N-1-n];

     a[i][N-1-n]=temp;

     temp=temp1;

}

for(i=N-1-index-1;i>index;i--){

     temp1=a[N-1-n][i];

     a[N-1-n][i]=temp;

     temp=temp1;

}

for(i=N-1-index;i>index;i--){

     temp1=a[i][index];

     a[i][index]=temp;

     temp=temp1;

     printf("temp=%d",temp);

}

printf("temp=%d\n",temp);

a[index][index]=temp;

}

void main(){

int i,j,num=1;

clrscr();

scanf("%d",&N);

for(i=0;i<N;i++){

for(j=0;j<N;j++){

a[i][j]=num++;

}

}

for(i=0;i<N;i++){

for(j=0;j<N;j++) {

printf("%d ",a[i][j]);

}

printf("\n");

}

move=N/2;

n=0;

printf("move=%d\n",move);

while(move){

for(i=0;i<move;i++){

rotate(n);

}

n++;

move--;

}

for(i=0;i<N;i++){

for(j=0;j<N;j++) {

printf("%d ",a[i][j]);

}

printf("\n");

}

getch();

}

print the pattern 3 4 33 34 43 44 333 334..

#include<stdio.h>
int main(){
int n,k=1,a[10000],i;
a[0]=3,a[1]=4;
scanf("%d",&n);
for(i=0;i<n;i++){
a[++k]=(a[i]*10)+3;
a[++k]=(a[i]*10)+4;
}
printf("%d",a[n-1]);
return 0;
}

Print a given matrix in spiral form

#include <stdio.h>

#define R 3

#define C 6

void spiralPrint(int m, int n, int a[R][C])

{

    int i, k = 0, l = 0;

    /*  k - starting row index

        m - ending row index

        l - starting column index

        n - ending column index

        i - iterator

    */

    while (k < m && l < n)

    {

        /* Print the first row from the remaining rows */

        for (i = l; i < n; ++i)

        {

            printf("%d ", a[k][i]);

        }

        k++;

        /* Print the last column from the remaining columns */

        for (i = k; i < m; ++i)

        {

            printf("%d ", a[i][n-1]);

        }

        n--;

        /* Print the last row from the remaining rows */

        if ( k < m)

        {

            for (i = n-1; i >= l; --i)

            {

                printf("%d ", a[m-1][i]);

            }

            m--;

        }

        /* Print the first column from the remaining columns */

        if (l < n)

        {

            for (i = m-1; i >= k; --i)

            {

                printf("%d ", a[i][l]);

            }

            l++;   

        }       

    }

}

/* Driver program to test above functions */

int main()

{

    int a[R][C] = { {1,  2,  3,  4,  5,  6},

        {7,  8,  9,  10, 11, 12},

        {13, 14, 15, 16, 17, 18}

    };

    spiralPrint(R, C, a);

    return 0;

}