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You have to clearly define what each if statement is doing in both programs. #include <stdio.h>...

You have to clearly define what each if statement is doing in both programs.

#include <stdio.h>

static unsigned char count = 31;

void callMe ( char ch )
{


if ( ch == 'U' || ch == 'u') {

if ( count > 15 )
count -= 16;
printf ( "count = %d \n", count ) ;
return;
}

if ( ch == 'A' || ch == 'a') {
if ( count % 2 == 1)
count -= 1;
printf ( "count = %d \n", count ) ;
return;
}

if ( ch == 'o' || ch == 'O') {
if ( (count / 8 == 3) || (count / 8 == 1) )
count -= 8;
printf ( "count = %d \n", count ) ;
return;
}

if ( ch == 'i' || ch == 'I') {
if ( (count / 4 == 7) || (count / 4 == 5)
|| (count / 4 == 3) || (count / 4 == 1 ) )
count -= 4;
printf ( "count = %d \n", count ) ;
return;
}

if ( ch == 'e' || ch == 'E') {
if ( (count / 2 == 15 ) || (count / 2 == 13 )
|| (count / 2 == 11 ) || (count/2 == 9 )
|| (count/2 == 7 ) || (count/2 == 5 ) || ( count/2 == 3 || ( count/2 == 1 ))
)
count -= 2;
printf ( "count = %d \n", count ) ;
return;
}

}
int main(void) {
printf ( "Please enter a string of character\n");
char ch = getchar ( ) ;
while ( ch != '\n') { callMe (ch); ch = getchar() ;}

if (count ) {
printf ( "Some letters are missing \n");
printf ( " %d \n", count );
}

return 0;
}


2.
int main ( )
{
// COMMENT ALL THE LINES EXCEPT ONE
char data [ 16 ] = "aa";
//char data [ 16 ] = "Hello";
//char data [ 16 ] = "CSU";
//char data [ 16 ] = "happy";

unsigned char len = strlen ( data); // returns the length of data

int i = 0, temp = 0 ;

for ( i = 0 ; i < len ; i++)
{
char ch = toupper ( data [ i] ); // converts lower case to upper case

if ( temp & ( 1 << ( ch - 65 ) ) ) //it was i, it should be 1
{
printf ( " THis is not good a string \n") ;
// you could call printBits function here to see the value of temp
return 0; // added return
}
else {
temp = temp | ( 1 << ( ch - 65 ) ) ; // it was <, it should be <<
// you could call printBits function here to see the value of temp
}
}

printf ( "This is a good string\n");

}

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Homework Answers

Answer #1

Program 1 commented with each if statement :

#include <stdio.h>

static unsigned char count = 31;

void callMe ( char ch )
{

//check entered char is "U" or "u"
if ( ch == 'U' || ch == 'u') {
//check count value is greater than 15
if ( count > 15 )
//subtract count with 16
count -= 16;
printf ( "count = %d \n", count ) ;1
return;
}
//check entered char is "A" or "a"
if ( ch == 'A' || ch == 'a') {
//check remainder of dividing count by 2 is equal to 1
if ( count % 2 == 1)
//subtract count with 1
count -= 1;
printf ( "count = %d \n", count ) ;
return;
}
//check entered char is "o" or "O"
if ( ch == 'o' || ch == 'O') {
//check quotient of (count/8) equal to 3 or 1
if ( (count / 8 == 3) || (count / 8 == 1) )
//subtract count with 8
count -= 8;
printf ( "count = %d \n", count ) ;
return;
}
//check entered char is "i" or "I"
if ( ch == 'i' || ch == 'I') {
//check quotient of (count/4) equal to 7 or 5 or 3 or 1
if ( (count / 4 == 7) || (count / 4 == 5)
|| (count / 4 == 3) || (count / 4 == 1 ) )
//subtract count with 4
count -= 4;
printf ( "count = %d \n", count ) ;
return;
}
//check entered char is "e" or "E"
if ( ch == 'e' || ch == 'E') {
//check quotient of (count/2) equal to 15 or 13 or 11 or 9 or 7 or 5 or 3 or 1
if ( (count / 2 == 15 ) || (count / 2 == 13 )
|| (count / 2 == 11 ) || (count/2 == 9 )
|| (count/2 == 7 ) || (count/2 == 5 ) || ( count/2 == 3 || ( count/2 == 1 ))
)
//subtract count with 2
count -= 2;
printf ( "count = %d \n", count ) ;
return;
}

}
int main(void) {
printf ( "Please enter a string of character\n");
char ch = getchar ( ) ;
while ( ch != '\n') { callMe (ch); ch = getchar() ;}
//check count is greater than 0 or not
if (count) {
printf ( "Some letters are missing \n");
printf ( " %d \n", count );
}

return 0;
}

Program 2 commented with each if statement :

int main ( )
{
// COMMENT ALL THE LINES EXCEPT ONE
char data [ 16 ] = "aa";
//char data [ 16 ] = "Hello";
//char data [ 16 ] = "CSU";
//char data [ 16 ] = "happy";

unsigned char len = strlen (data); // returns the length of data

int i = 0, temp = 0 ;

for ( i = 0 ; i < len ; i++)
{
char ch = toupper ( data [i] ); // converts lower case to upper case

//check bitwise "and" operation performed with temp & value obtained after left shift of "1" by (ch-65) evaluates to TRUE
if ( temp & ( 1 << ( ch - 65 ) ) ) //it was i, it should be 1
{
printf ( " THis is not good a string \n") ;
// you could call printBits function here to see the value of temp
return 0; // added return
}
else {
//perform bitwise "or" operation with temp & value obtained after left shift of "1" by (ch-65) & store back to temp
temp = temp | ( 1 << ( ch - 65 ) ) ; // it was <, it should be <<
// you could call printBits function here to see the value of temp
}
}

printf ( "This is a good string\n");

}

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