Thread: compilation error

hi i downloaded a source-code from the net for testing. the source code folder contains around 40 files(.cpp + .h ) along with a readme.txt.

for compilation they have given told to type "make".
after typing "make" ....i got the following....

$ make

g++ -c -O2 -Wall bat_graph.cpp
bat_graph.cpp: In method `int bat_graph::get_params ()':
bat_graph.cpp:147: `sscanf' undeclared (first use this function)
bat_graph.cpp:147: (Each undeclared identifier is reported only once
for each function it appears in.)
make: *** [bat_graph.o] Error 1



what could be the possible error ? what does the compiler pointing ?

you know, i went to line 147 of the code bat_graph.cpp (according to compiler's notification) , but i found nothing is wrong there.

well, what i have found there i am writng below......
( code is big...so i am excerpting imporatant points)

snippet from the code bat_graph.cpp ......

Code:

 // blah.....
  
  char c;
    134   char *pp = Preamble;
    135   int stop = 0;
    136   char *tmp = new char[100];
    137 
    138   Nr_vert = Nr_edges = 0;
    139 
    140   while (!stop && (c = *pp++) != '\0'){
    141     switch (c) {
    142     case 'c':
    143       while ((c = *pp++) != '\n' && c != '\0');
    144       break;
    145 
    146     case 'p':
    147       sscanf(pp, "%s %d %d\n", tmp, &Nr_vert, &Nr_edges);
    148       stop = 1;
    149       break;
    150 

// blah.....

do you think is there anything wrong at line 147 ? i dont see any error....

anyway, can you suggest what could be the problem by watching compiler's notification.

the whole code is big enough so, i have given a snippet of the troublesome area notified by the compiler.

any suggestion to remove error ?

thanks

At the top of the source file containing the error, add this line:

Code:

#include <cstdio>
using namespace std;

That might work.

ohh...yes. right. the same problem was also in other file . i have checked it.

thanks