#include <stdio.h>
#define N 5
void inputMatrix(int b[N][N]);    /*Enter Matrix Values*/
void outputMatrix(int b[N][N]);   /*Print Matrix*/
void rotateDiagonal(int b[N][N]); /*Rotate the matrix around the diagonal*/
void rotateRow(int b[N][N]);      /*Rotate the matrix around the middle row */
void rotateColumn(int b[N][N]);   /*Rotate the matrix around the middle column*/
void setUpperZero(int b[N][N]);   /*Set the upper triangle to zero*/

int a[N][N],c[N][N];
int i=0,j=0;
void clrscr();
#define getch getchar
int main(void)
{
    int n=0;
    int chose = 0;
    int entered = 0;
    while(1){
    chose = menu();
    chose = chose - 48;
    if(chose == 0)
        exit(1);
    if(chose == 1)       /*sign the matrix*/
    {
        entered = 1;
     }
    if(entered)
    {
        
        if(entered)
        {
            for(i=0;i<N;i++)
            {
                for (j=0;j<N;j++)
                {
                    c[i][j] = a[i][j];
                }
            }
        }
        switch (chose)
        {
            case 1: inputMatrix(a);;break;
            case 2: rotateDiagonal(c);outputMatrix(c);getch();break;
            case 3: rotateRow(c);outputMatrix(c);getch();break;
            case 4: rotateColumn(c);outputMatrix(c);getch();break;
            case 5: setUpperZero(c);outputMatrix(c);getch();break;



        }
    }
    else{
        printf("Matrix is not exist");
        getch();
    }
    clrscr();
     

    }


  getch();
  return 0;
}

int menu()
{
    printf("1 - Enter Matrix Values\n");
    printf("2 - Rotate around Diagonal\n");
    printf("3 - Rotate around the middle row\n");
    printf("4 - Rotate around the middle column\n");
    printf("5 - Set the upper triangle to zero\n");
    printf("0 - exit\n");


    return getch();

}

void inputMatrix(int b[N][N])  /*Enter Matrix Values*/
{
    printf("Enter Matrix Values:\n");
   for(i=0;i<N;i++)
  {
        for(j=0;j<N;j++)
            scanf("%d",&b[i][j]);

  }
}

void outputMatrix(int b[N][N])     /*Print Matrix*/
{
    printf("output the matrix:\n");
    for(i=0;i<N;i++)
    {
        for(j=0;j<N;j++)
            printf("%d  ",b[i][j]);
        printf("\n");
    }
}

void rotateDiagonal(int b[N][N])      /*Rotate the matrix around the diagonal*/
{

    int temp=0;
    i=j=0;
    printf("Rotate the matrix around the diagonal:\n");
    for(i=0;i<N;i++)
    {
        for(j=0;j<i;j++)
        {   
            temp = b[i][j];
            b[i][j] = b[j][i];
            b[j][i] = temp;
        }
    }
}

void rotateRow(int b[N][N])          /*Rotate the matrix around the middle row */
{

    int temp = 0;
    printf("Rotate the matrix around the middle row:\n");
    for(i = 0;i < N-i-1;i++)
    {
      for (j = 0;j<N;j++)
      {
        temp = b[i][j];
        b[i][j] = b[N-i-1][j];
        b[N-i-1][j] = temp;
      }

    }
}
void rotateColumn(int b[N][N])         /*Rotate the matrix around the middle column*/
{

    int temp = 0;
    printf("Rotate the matrix around the middle column:");
    for(i = 0;i < N-i-1;i++)
    {
      for (j = 0;j<N;j++)
      {
        temp = b[j][i];
        b[j][i] = b[j][N-i-1];
        b[j][N-i-1] = temp;
      }

    }

}

void setUpperZero(int b[N][N])           /*Set the upper triangle to zero*/
{

    i=j=0;
    printf("Set the upper triangle to zero \n");
    for(i=0;i<N;i++)
    {
        for(j=0;j<i;j++)
        {   

            b[j][i] = 0;
        }
    }
   
    
}

void clrscr()
{
int i;
	for (i = 0; i < 25; i++)
	{
		printf("\r\n");
	}
}