Input and output:


1.) Suppose that we call scanf as follows:

    float x,y;
    int i;
    scanf("%f%d%f", &x, &i, &y);

    if the user enters

    12.3 45.6 789

    What will be the values of x,i, and y after the call?
    
2.) What output do the following calls of printf produce?
    a.) printf("%6d, %4d", 86, 1040);
    b.) printf("%12.5lf", 30.253);
    c.) printf("%2d%5.2lf%d", 300,0.2,1024);

Characters Strings and I/O

3: 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");


4: 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';

5: 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){













}


6: 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){
     





}



Command Line arguments /String manipulation:

7: Given a string of ingredients in the form "applesauce,butter,clementines", i.e. strings separated by commas, write a function nth_ingredient, which takes a string of this form, and a number n, and returns the nth element in that list.  (Hint: use strtok). If n is larger than the number of elements in the list return null.

char * nth_ingredient(char * list, int n){









}


8: Write the following function:
bool test_extension (const char *file_name,
     		     const char *extension);
file_name points to a string containing a file name. The function should return true if the file's extension matches the string pointed to by extension, ignoring the case of letters. For example, the call test_extension("memo.txt", "TXT") would return true.
(Hint: Use the toupper function, and strtok)
bool test_extension (const char *file_name,
     		     const char *extension){











}


Input Output:

9: Write the following function:
int line_length(const char *filename, int n);
The function should return the length of the line n in the text file
whose name is filename. If the line doesn't exist return 0;

int line_length(const char *filename, int n){













}
Combined review

10:Given a stack with the following definition
#define MAX_STACK_SIZE 50
/* Size of all stack arrays */

typedef struct {
  int topPosition;
  char * stackArray[MAX_STACK_SIZE];
} stringStack;  


and standard functions, write a function which takes a string similar
to the type in problem 2, and stores it in the stack. Then, write a
function that takes a stack, and writes its output to a file via
popping