Makefile autogenerated by shell script for a given .c code file Post: 302275275

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Top Forums Shell Programming and Scripting Makefile autogenerated by shell script for a given .c code file Post 302275275 by darius2 on Friday 9th of January 2009 03:34:52 PM

01-09-2009

Banned

Quote:

Originally Posted by fpmurphy

Have you looked at GNU autotools? GNU build system - Wikipedia, the free encyclopedia

Hi,
spent another day with Makefile and Gnuplot, shell scripting, larning gnuplot to read a script, to read output from shell script , to read data file and more.

One example I follow now
compiling basic .c code examples from the net is:

gcc helloworld.c -o helloworld

It doesn't work for another example .c code program from the net

[admin@oo helloworld]$ gcc squares.c -o squares
squares.c: In function 'main':
squares.c:8: error: expected expression before '=' token
[admin@oo helloworld]$

---------
squares.c code is
what is wrong ?
--------------
#include <stdio.h>
main() {
double x;
FILE *datafile;

datafile = fopen("squares.dat","w");

for(x = 0.0; x < = 4.0; x += 1.0)
fprintf(datafile, "%4.1f %4.1f\n", x, x * x);

fclose(datafile);
}

This program should create data file to be read by gnuplot.

source
Introductory Graphing
Here is a C program to create this file.

(see above)

Darius

darius2

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matho-sumsq

MATHO-SUMSQ(1)						       Mathomatic Utilities						    MATHO-SUMSQ(1)

NAME

       matho-sumsq - Find the minimum sum of the squares for integers

SYNOPSIS

       matho-sumsq [numbers]

DESCRIPTION

       This  command-line  utility  is	optionally  part of the mathomatic(1) package.	It finds the minimum number of positive integers that when
       squared and added together, equal the given number.  There is a proof that no more than 4 squares summed together are required to represent
       any positive integer.

       The  command-line  may contain positive integers to find the minimum squares of, they must be less than 2147483648 (2^31) on 32-bit systems
       or less than 9223372036854775808 (2^63) on 64-bit systems.  If "+" is appended to the given number, the program counts up  from	the  given
       number.	If the minimum number of squares is 2, this program displays all possible combinations with 2 squares for the given number, other-
       wise it just displays the first combination it finds.

       If no command-line arguments are given, the programs reads the numbers from standard input.

AUTHOR

       George Gesslein II (gesslein@mathomatic.org) at "http://www.mathomatic.org".

REPORTING BUGS

       If you find a bug, please report it to the author or at "https://launchpad.net/mathomatic".

SEE ALSO

       mathomatic(1), matho-pascal(1), matho-primes(1)

Mathomatic															    MATHO-SUMSQ(1)

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