...implement printf() function in 'C' ?

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Answer by kumar
Submitted on 2/22/2007
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#define putchar(c) outbyte(c) static void printchar(char str, int c) { extern int putchar(int c); if (str) { str = c; ++(str); } else (void)putchar(c); } #define PAD_RIGHT 1 #define PAD_ZERO 2 static int prints(char out, const char string, int width, int pad) { register int pc = 0, padchar = ' '; if (width > 0) { register int len = 0; register const char ptr; for (ptr = string; ptr; ++ptr) ++len; if (len >= width) width = 0; else width -= len; if (pad & PAD_ZERO) padchar = '0'; } if (!(pad & PAD_RIGHT)) { for ( ; width > 0; --width) { printchar (out, padchar); ++pc; } } for ( ; string ; ++string) { printchar (out, string); ++pc; } for ( ; width > 0; --width) { printchar (out, padchar); ++pc; } return pc; }

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Question by lak
Submitted on 11/27/2003
Related FAQ: comp.lang.c Answers (Abridged) to Frequently Asked Questions (FAQ)
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How to implement printf() function in 'C' ?

Answer by adnan buland
Submitted on 11/9/2004
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printf function show what ever we write.if want to print i love u then apply this printf("i love u");

Answer by Ravi Shankar
Submitted on 12/10/2004
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u can create ur own printf function by using BIOS/DOS Interrupts.Turboc c provides some functions like int86(),int86x() to execute interrupts using regs.so u can write a function just like printf() and u can specify parameters 4 that. This is just like mouse events program in c.

Answer by Saravanakumar
Submitted on 8/3/2005
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#include <stdio.h> #include <stdarg.h> int MyPrint(char *fmt, ...) { va_list ap; va_start(ap,fmt); return(printf(fmt,ap)); } int main() { printf("Hi %s My age is %d years and %f months","Dear",18,3.4); }

Answer by aishwarya
Submitted on 4/14/2006
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look for Variable argument lists ... #include <stdarg.h>

Answer by Sumonto
Submitted on 11/15/2006
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Include stdarg.h header file and create printf function which can take indefinite number of parameters. ( Refer help on stdarg.h's varlist topic). Make the first parameter of string type. In the function , analyze the string and count no. of % sign which will give you an idea of no. of arguments coming after the string.

Answer by ja
Submitted on 1/7/2007
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using the library stbarg

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