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character_funct.c
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character_funct.c
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// This program checks all types of characters in different way.
#include <stdio.h>
#include <ctype.h>
#include <conio.h>
int main()
{
char ch;
printf("Press space bar to exit.");
// isalnum() checks alphanumeric characters.
printf("\nThis program checks alphanumeric characters.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(isalnum(ch))
printf("\n%c is a alphanumeric character.\n", ch);
}
// isalpha() checks alphabets.
printf("\nThis program checks alphabets.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(isalpha(ch))
printf("\n%c is a alphabet.\n", ch);
}
// iscntrl() checks control characters.
printf("\nThis program checks control characters.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(iscntrl(ch))
printf("\n%c is a control character.\n", ch);
}
// isdigit() checks digits.
printf("\nThis program checks digits.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(isdigit(ch))
printf("\n%c is a digit.\n", ch);
}
// isgraph() checks all printing characters (without space).
printf("\nThis program checks all printing characters without space.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(isgraph(ch))
printf("\n%c is a printable character.\n", ch);
}
// islower() checks lowercase letters.
printf("\nThis program checks lowercase letters.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(islower(ch))
printf("\n%c is a lowercase letter.\n", ch);
}
// isupper() checks alphabets.
printf("\nThis program checks uppercase letters.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(isupper(ch))
printf("\n%c is a uppercase letter.\n", ch);
}
// ispunct() checks punctuation.
printf("\nThis program checks punctuation.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(ispunct(ch))
printf("\n%c is a punctuation.\n", ch);
}
// isxdigit() checks hexadecimal digits.
printf("\nThis program checks hexadecimal digits.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch==' ') break;
if(isxdigit(ch))
printf("\n%c is a hexadecimal digit.\n", ch);
}
printf("Press Q to exit.");
// isprint() checks printable characters.
printf("\nThis program checks printable characters.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch=='Q') break;
if(isalpha(ch))
printf("\n%c is a printable character.\n", ch);
}
// isspace() checks whitespace characters.
printf("\nThis program checks whitespace characters.");
for(;;) {
printf("\nType anything: ");
ch = getch();
if(ch=='Q') break;
if(isalpha(ch))
printf("\n%c is a whitespace character.\n", ch);
}
return 0;
}