Characters Strings and I/O

0: The following function calls supposedly write a single
    new-line character, but some are incorrect. Identify
    which calls don't work

    a.) printf("%c",'\n');
    b.) printf("%c", "\n");
    c.) printf("%s", '\n');
    d.) printf("%s", "\n");
    e.) printf('\n');
    f.) printf("\n");
    g.) putchar('\n');
    h.) putchar("\n");


1: What will be the value of thst string s1 after the following
    program fragment has been executed?

    strcpy(s1, "computer");
    strcpy(s2, "science");
    if (strcmp(s1,s2)<0)
       strcat(s1,s2);
    else
	strcat(s2,s1);
    s1[strlen(s1)-6] = '\0';

2: Write a function that takes a string ret, and an int size and
    reads data into that string until it is full, or the user enters a
    new line. Skip white space
    
void skip_whitespace(char * ret,int size){













}


3: Write a function that reads in a given number of characters, then
 prints our the result. If the char is an upper or lower case
 character, switch the case. If the char is a digit print that number
 of $ characters.

void switch_case(int length){
     





}


2D Arrays:

4: Assume ROWS and COLUMNS are defined constants. Write a program
 void add_matrices(int arr1[ROWS][COLUMNS], int arr2[ROWS][COLUMNS])
 that performs matrix addition(adding numbers in corresponding 
 indices)changes arr1 to that matrix.
 
 void add_matrices(int arr1[ROWS][COLUMNS], int arr2[ROWS][COLUMNS]){





}

5: Write a function add_rows, which takes in a 2D array, and a array
 with COLUMNS rows row_sum, and stores the sum of each row in
 row_sum.

void add_rows(int arr[ROWS][COLUMNS],int row_sum[COLUMNS]){











}


6:
Write a program fragment that declares
an 8x8 char array named checker_board then
uses a loop to store the following data into
the array

B R B R B R B R
R B R B R B R B
B R B R B R B R
R B R B R B R B
B R B R B R B R
R B R B R B R B
B R B R B R B R
R B R B R B R B




7: Write a function averagePoint, which takes a 2D array
   of integers, and a location within that array, and
   returns the integer which is the average of that point in the
   array, and all adjacent points. If the point is on the edge of
   the 2D array, you should only average the points within the
   boundaries. If the point is outside of the 2D array, return
   0. Assume ROWS and COLUMNS are defined to be the size of the array
   you are working with

int averagePoint(int grid[ROWS][COLUMNS] , int pointRow, int pointColumn){


















}


8: Write a function average2DArray, which set every value to be the
   average of itself and its neighbors, using the function we wrote
   above.Assume ROWS and COLUMNS are defined to be the size of the array
   you are working with.
   

void average2DArray(int grid[ROWS][COLUMNS]){













}

There is a subtle danger here, can you catch it? Hint, applying this
function to

0  0 0
0 12 0
0  0 0

should result in

3 2 3          3 2 3
2 1 2   Not    2 2 1
3 2 3          1 1 1

Image Processing/ Structs:

9: Modify  the functions you wrote above to work on pictures.

Pixel averagePixels(Picture * pic, int pixelRow, int pixelColumn){






















}


void averagePicture(Picture * pic){













}


10: Write a program void rotate(Picture* pic) that rotates the RGB
values of every pixel. So the R value gets stored in the G spot,
the G value in the B spot and the B value in the R spot.
Nothing is returned but pic should point to this new image
by the end of the program.