Thread: Ouput In String In Uppercase

Code:

I have a program that takes in a string of less than 80 characters  from keyboard. 
AND it will convert all alphabets into UPPERCASE.

But I do not know how to exclude numbers, punctuations, hyphens, spaces, symbols etc. when displaying.

for the time being my program is this:

#include <stdio.h> 
#include <ctype.h> 

void upstr(char *s)
{
  char  *p;

  for (p = s; *p != '\0'; p++) 
    *p = (char) toupper(*p);
}

int main(void)
{
  char  mystring[] = "strawberry cake!";
  puts(mystring);
  upstr(mystring);
  puts(mystring);
  return(0);

}

how do i exclude this punctuations and spaces???
i need HELP!!!

http://www.cplusplus.com/reference/clibrary/cctype/

switch/if statement and check the truth of these functions.

You'll need an extra pointer -- one for where you're reading from, one for where you're reading to. If the char you get from toupper does not satisfy isupper, then it's not a letter.

how do u exclude those space, comas those symbols?

If the functions come back true just ++ your pointer or array indice. Like you are doing in your example in the for loop.