Assignment name : str_capitalizer
Expected files : str_capitalizer.c
Allowed functions: write
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Write a program that takes one or several strings and, for each argument,
capitalizes the first character of each word (If it's a letter, obviously),
puts the rest in lowercase, and displays the result on the standard output,
followed by a \n.
A "word" is defined as a part of a string delimited either by spaces/tabs, or
by the start/end of the string. If a word only has one letter, it must be
capitalized.
If there are no arguments, the progam must display \n.
Example:
$> ./str_capitalizer | cat -e
$
$> ./str_capitalizer "a FiRSt LiTTlE TESt" | cat -e
A First Little Test$
$> ./str_capitalizer "__SecONd teST A LITtle BiT Moar comPLEX" " But... This iS not THAT COMPLEX" " Okay, this is the last 1239809147801 but not the least t" | cat -e
__second Test A Little Bit Moar Complex$
But... This Is Not That Complex$
Okay, This Is The Last 1239809147801 But Not The Least T$
$>
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#include <unistd.h>
void str_capitalizer(char *str)
{
while (*str != '\0')
{
while (*str != '\0' && (*str == ' ' || *str == '\t'))
{
write(1, str, 1);
++str;
}
if (*str != '\0')
{
if (*str >= 'a' && *str <= 'z')
*str = *str - ('a' - 'A');
write(1, str, 1);
++str;
}
while (*str != '\0' && *str != ' ' && *str != '\t')
{
if (*str >= 'A' && *str <= 'Z')
*str = *str + ('a' - 'A');
write(1, str, 1);
++str;
}
}
write(1, "\n", 1);
}
int main(int argc, char **argv)
{
if (argc == 1)
write(1, "\n", 1);
else
{
int i = 1;
while (i < argc)
{
str_capitalizer(argv[i]);
++i;
}
}
return (0);
}
