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How do I print the symbol theta in C language

What I have tried:

Nothing...no idea..................
Posted
Updated 5-Mar-17 1:13am

Try:
#include <stdio.h>

int main()
{
    printf("Theta: Θ\n");

    return 0;
}
 
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Comments
ArvindSai 4-Mar-17 9:54am    
I don't find any key on my keyboard that prints the symbol theta, besides I found myself that ASCII 233 will hold the symbol for theta, How did you enter it through keyboard.
Graeme_Grant 4-Mar-17 10:06am    
OriginalGriff 4-Mar-17 10:13am    
Depends - the simplest way is just to copy'n'paste the character. That's what I did!

Bear in mind that Windows doesn't use ASCII - it uses Unicode, which is a 16 bit "super version" of ASCII (which is technically 7 bit, but has an Enhanced version which is 8 bit and includes Theta). So you want the Unicode Theta which is \u03f4 and may (or may not) be enterable as a string character in your C - depending on what the compiler is.
See what I mean that copy'n'paste is easier? :laugh:
ArvindSai 4-Mar-17 10:11am    
Well thank you, but my laptop keyboard doesn't have the numpad, just the numbers keys above the alphabets i tried using that but it didn't work, how can I do it without using Numpad
ArvindSai 4-Mar-17 10:15am    
That should work:laugh:
Google gods have the answer that you are looking for...

Search used: theta character hex value[^]

Answer found: Unicode Character 'GREEK SMALL LETTER THETA' (U+03B8)[^]
 
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[no name] 5-Mar-17 7:38am    
A 5 for such a complete answer.
I mean show how to Google _including_ the appropriate keywords and last but not least giving a hint which answer may help.
*laugh*
Graeme_Grant 5-Mar-17 7:52am    
:) They are gods ... so easy to find what you are looking for... even my 75+-year-old parents find it easy... and they have Logizomechanophobia[^] ;)
I am not able to print to the console but I am attaching a program which writes to a text file that can be opened in notepad (or notepad++)
The UTF-8 spec is detailed in wikipedia and the code is based on that. There is also a commented out code with the link.

#include <stdio.h>

#define MAX_PRINT 		25

int codepoint2utf8(unsigned char *utf8, unsigned int codepoint);
int getbytecount(unsigned int codepoint);

unsigned int alpha = 0x3b1; // UNICODE value for ALPHA
unsigned char utf8str[10];

unsigned char utf8_flag_bytes[] = {	0xef, 0xbb, 0xbf };  // these leading values at start of file (.txt) denote UTF-8 encoding

char *filename = "greek.txt";
void main()
{
	FILE *fp;
	int codelen;
	int i;
	
	fp = fopen(filename, "wb");
	fwrite(utf8_flag_bytes, 1, 3, fp);  // first write the UTF-8 signature to the start of file
	
	for(i = 0; i < MAX_PRINT; i++)
	{
		codelen = codepoint2utf8(utf8str, alpha + i);
		codelen += codepoint2utf8(utf8str + codelen, ' ');

		fwrite(utf8str, 1, codelen, fp);
	}
	
	fclose(fp);
}

int codepoint2utf8(unsigned char *utf8, unsigned int codepoint)
{
	unsigned char byteval, mask, leadbyte = 0, countbit = 0;
	int numbytes, i;
	
	mask = 0x3f;   // mask for continuation byes ie for extracting least significant 6 bits
	
	numbytes = getbytecount(codepoint);
	if(numbytes > 1)
		countbit = (1 << 7);
	for(i = numbytes - 1; i > 0; i--, countbit >>= 1)
	{
		byteval = (codepoint & mask) | (1 << 7);
		leadbyte |= countbit;  // set next significant bit for each byte added
		codepoint >>= 6;      // next 6 bits
		utf8[i] = byteval;
	}
	leadbyte |= (countbit | codepoint);
	utf8[i] = leadbyte;
	
	return numbytes;
}

int getbytecount(unsigned int codepoint)
{
	unsigned int i, bits, continuations = 0, leadbits = 5;
	
	for(i = 31, bits = 0; i > 0 && bits == 0; i--)
	{
		if((1 << i) & codepoint)
			bits = i + 1;
	}
	
	if(bits <= 7)
		goto exitpoint;
	
	continuations = 1;  // min value
	while(bits > leadbits + continuations * 6)  // 'leadbits' is no of bits avail for coding in lead byte 
	{                                           // every continuation byte is of the form 10xxxxxx where 'xxxxxx' represents part codepoint value
		leadbits--;
		continuations++;
	}
	
exitpoint:
	return (1 + continuations);  // no of bytes reqd is 1(for lead byte) + no of continuation bytes
}

/*
-- link http://stackoverflow.com/questions/4607413/c-library-to-convert-unicode-code-points-to-utf8
if (c<0x80) *b++=c;
else if (c<0x800) *b++=192+c/64, *b++=128+c%64;
else if (c-0xd800u<0x800) goto error;
else if (c<0x10000) *b++=224+c/4096, *b++=128+c/64%64, *b++=128+c%64;
else if (c<0x110000) *b++=240+c/262144, *b++=128+c/4096%64, *b++=128+c/64%64, *b++=128+c%64;
else goto error;
*/
 
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Comments
[no name] 5-Mar-17 7:15am    
Looks like he is not OP ;)
Graeme_Grant 5-Mar-17 7:31am    
whoopsie... sounded like him... must check in future...

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