What would happen if the following piece of code was compiled?

#include <stdio.h>

int main()
{
        int a,b,c;
        scanf("%d",&a);
        scanf("%d",&b);
        float c = a+b;
        printf("%f\n",c);
        return 0;
}

Write a C program that reads four

integers and displays the pair with the largest sum. For example, if the

user enters 10, -8, 17 and 5, the program

should display

There are two statements associated with

loops - break and continue. When a break

is encountered inside a loop, program control is transferred outside of it. So,

you use a break within a loop when you want to stop the loop execution at that

instant.

For instance, let’s

suppose you want to find out and print the first occurring multiple of 19

between two given numbers n1 and n2. Here’s what you will do:

int found = 0;  /* a flag to indicate whether multiple found
or not */
for (i=n1; i<=n2; ++i)
  if (i % 19 == 0){
        found=1;    /* setting flag to 1 */
        break;       /* multiple of 19 found; don’t look further */
  }
  if (found)
       printf("%d is the first multiple of 19 between %d and %d.\n", i, n1, n2);
 else 
       printf("There is no multiple of 19 between %d and %d.\n", n1,n2);

Rewrite the following for loop as a

while loop (make sure to include the rest of the required

preceding code):

for(x = 1; x < 10; x++)
{
   printf("%d", x);
}

and the following

while loop as a for loop:

a = 1;
b = 6;
while (a < b)
{  
   a++;  
   printf("%d\n", a);
}

You can find the declarations of

mathematical functions in the header file

<math.h> that you must #include in your program just as you do <stdio.h>. For instance, to use

a function such as pow(),

to get the square of x and

store the result in y,

you will write the following C code:

int
x, y;
x = pow(x, 2);

Now

try to compile the file q5.c as

usual. Do you get an error message that says, "Undefined

reference to pow"? Since we have a math feature in our

program, we need to compile the program slightly differently.

    $gcc q3.c –lm

The

option

Using

this information, write a C program that reads a positive integer and displays

the largest positive integer N for

which the sum 1

Write a program that prints a

Fahrenheit-to-Celsius conversion table from 0 C to 100 deg. C at intervals of

10 deg. C. The table should appear in the format shown below:

  0 degrees F =  -17 degrees C

 10 degrees F =  -12 degrees C

...

...

Recall the question from last week’s

lab exercise to print the difference between itself and its reverse. Modify

your solution to work for any n-digit number taken as input, using a while loop.

The continue statement must be associated

with a loop. When encountered, program control jumps to the end of the loop

iteration, disregarding the rest of the loop body. For instance, let’s suppose

you want to

for (i=n1; i<=n2; ++i) { 
   if (i % 19 == 0)
        continue;  /* the remainder of the loop body is skipped */
   printf("%d\n", i);
}

Write a C program that takes a string input from the user and shifts each character forward by one using pointer arithmetic. For instance, the string "Hello" should be changed to "Ifmmp". 

Convert this program into a function called encode(char arr[]) and implement another function called decode(char arr[]) to shift each character of a string back by one. 

char str[] = "Hello";
encode(str); /* str changed to "Iffmp" */
decode(str); /* str changed to "Hello" */