|
|
Text stream K&R exercises
01-16-2010
/*
* blank.c
*
* Exercise 1-8, write a program that counts blanks, tabs and newlines.
*/
#include <stdio.h>
main(){
int x,s,t,n;
s = 0; // counter for spaces
t = 0; // counter for tabs
n = 0; // counter for newlines
while ((x = getchar()) != EOF){
if (x == ' ') // x is a blank space
s++;
if (x == '\t') // x is a tab
t++;
if (x == '\n') // x is a newline
n++;
} // End while
printf("\nThere were ");
printf("%d", s);
printf(" spaces.\n");
printf("There were ");
printf("%d", t);
printf(" tabs.\n");
printf("There were ");
printf("%d", n);
printf(" newlines.\n\n");
} // End main
I'm off to look at 1-9./*
* copy.c
*
* Exercise 1-9. Write a program to copy it's input to it's output,
* replacing each string of one or more blanks by a single blank.
*/
#include <stdio.h>
main() {
int c; //the current character
while ((c = getchar()) != EOF) {
if (c == ' ') { // If there's a blank space
while ((c = getchar() == ' ')) { /* Get another character, check to
see if it's a blank space. We don't
care how many blank spaces there are, so
if it's a blank space, do nothing. If it's
not a blank space, break out of the while
loop. */
; /* The do nothing command. When it breaks out of this loop,
c will be holding the first character after the string
of blank spaces.*/
} // end while
printf(" "); //But there was at least one blank space, so we need
// to print one blank space.
} // end if
printf(c); // print the character
} // end while
} // end main/*
* copy.c
*
* Exercise 1-9. Write a program to copy it's input to it's output,
* replacing each string of one or more blanks by a single blank.
*/
#include <stdio.h>
main() {
int c; //the current character
while ((c = getchar()) != EOF) {
if (c == ' ') { // If there's a blank space
while ((c = getchar() == ' ')) {
/* Get another character, check to see if it's a blank space. I don't
care how many blank spaces there are, so if it's a blank space, do nothing.
If it's not a blank space, break out of the while loop. */
; /* The do nothing command. When it breaks out of this loop,
c will be holding the first character after the string
of blank spaces.*/
} // end while
printf(" "); //But there was at least one blank space, so we need
// to print one blank space.
} // end if
putchar(c); // print the character
} // end while
} // end main
01-16-2010
#include <stdio.h>
main()
{
int c, flag;
while ((c = getchar()) != EOF){
if (c == ' ') {
if (!flag) {
printf("%c", c);
flag=1;
}
continue;
}
printf("%c", c);
flag=0;
}
}
01-18-2010
/*
* copy2.c
*
* Exercise 1-9. Write a program to copy it's input to it's output,
* replacing each string of one or more blanks by a single blank.
*/
#include <stdio.h>
main(){
int c; // the current character
printf("\n\n");
while ((c = getchar()) != EOF) { // while not EOF
if (c == ' ') {
/* You enter this if loop if you hit one or more blank spaces.
No matter how many blank spaces there are, run through all of
them, doing nothing. */
while ((c = getchar()) == ' ') {
; // do nothing.
} // end while loop
/* c is now holding the first character afer however many blanks there were.
Replace all the blanks by printing one blank to output,
then leave the if loop and print the character. */
printf(" ");
} // end if loop
putchar(c);
} // end while loop
printf("\n\n");
} // end main/*
* replace.c
*
* Exercise 1-10. Write a program to copy its input to its output, replacing each tab
* by \t, each backspace by \b and each backslash by \\. This makes tabs and backslashes
* visible in an unambiguous way.
*/
#include <stdio.h>
main(){
int c; // the character
while ((c = getchar())!= EOF) {
if (c == '\t') { // if it's a tab
printf("\\t");
} // end if
else if (c == '\b') { // backspace
printf("\\b");
} // end else if
else if (c == '\\') { // backslash
printf("\\\\");
} // end else if
else
putchar(c);
} // end while loop
} // end main|
|
|
|