*****Listing 3*****


#include <stdio.h>

void trace1(const char *filename, int line)
{
     static unsigned int counter = 0;

     ++counter;
     fprintf(stderr, "T1 %3u: file: %s, line: %d\n",
             counter, filename, line)
{
     static unsigned int counter = 0;

     ++counter;
     fprintf(stderr, "T2 %3u: file: %s, line: %d\n\n",
             counter, filename, line);
}

The output produced from this version is:

T1> 1: file: t1l.c, line: 11
inside f
T2> 1: file: t1.c, line: 11

T1> 2: file: t1g.c, line: 7
inside f
T2> 2: file: t1g.c, line: 7

T1> 3: file: t1.c, line: 13
inside f
T2> 3: file: t1.c, line: 13

where T1 and T2 indicate the output from trace1 and trace2, respectively.


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