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Full Discussion: Grep with C variables.
Top Forums Programming Grep with C variables. Post 302387119 by AbelBs on Thursday 14th of January 2010 01:32:06 PM
Old 01-14-2010
Quote:
Originally Posted by Corona688
They're all strings then.

Code:
 char *var1="h";
char *var2="o";
char *var3="d";
char buf[512];

sprintf(buf, "grep -v \"%s %s %s\" file.txt", var1, var2, var3);
system(buf);


Thanks!!!!!!! U resolved my problem!!!
 

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ECVT_R(3)						     Linux Programmer's Manual							 ECVT_R(3)

NAME
ecvt_r, fcvt_r, qecvt_r, qfcvt_r - convert a floating-point number to a string SYNOPSIS
#include <stdlib.h> char *ecvt_r(double number, int ndigits, int *decpt, int *sign, char *buf, size_t len); char *fcvt_r(double number, int ndigits, int *decpt, int *sign, char *buf, size_t len); char *qecvt_r(long double number, int ndigits, int *decpt, int *sign, char *buf, size_t len); char *qfcvt_r(long double number, int ndigits, int *decpt, int *sign, char *buf, size_t len); DESCRIPTION
The functions ecvt_r, fcvt_r, qecvt_r and qfcvt_r are identical to ecvt, fcvt, qecvt and qfcvt, respectively, except that they do not return their result in a static buffer, but instead use the supplied buf of size len. See ecvt(3) and qecvt(3). NOTES
These functions are obsolete. Instead, sprintf() is recommended. CONFORMING TO
These functions are GNU extensions. SEE ALSO
ecvt(3), qecvt(3), sprintf(3) GNU
2002-08-25 ECVT_R(3)
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