getline();

[HugoFromBOSS]

Hello,

I am having trouble getting the getline() function in C++ to work I ahve read the references but I'm stilling having a hard time trying to get it to work can anybody help? thanks!

            FILE * pFile;
               char du_sum[50];
 
            string check_dir = ("servers/" + cmd_svrid);
            string du_dir = ("du -sb " + check_dir);
 
            pFile = popen(du_dir.c_str(), "r");
 
                if (pFile == NULL) {
 
                    perror ("Error opening file");
 
                } else {
 
                    fgets(du_sum, 100, pFile);
 
                    string du_string = du_sum;
 
                    find_and_replace(du_string, check_dir, "");
 
                    whitespace(du_string);
 
                    string total_bytes;
 
                    getline(du_string,total_bytes);
 
                    //find_and_replace(du_string, "\n", "");
 
                    string cmd_server_status_mysql = (total_bytes);
 
                printf(cmd_server_status_mysql.c_str());
 
                }
 
            pclose(pFile);

Thank you..

[hsn]

if you have a string str="welcome to thescripts\nc++,c";
and another string str2;
if you used the function getline(str,str2) str2 will be "welcome to the scripts" (not including the '\n'.
if you want to use cin in the getline function you just put it in the first parameter.

good luck and i hope i was helpful

[hsn]

Hello,

I am having trouble getting the getline() function in C++ to work I ahve read the references but I'm stilling having a hard time trying to get it to work can anybody help? thanks!

            FILE * pFile;
               char du_sum[50];
 
            string check_dir = ("servers/" + cmd_svrid);
            string du_dir = ("du -sb " + check_dir);
 
            pFile = popen(du_dir.c_str(), "r");
 
                if (pFile == NULL) {
 
                    perror ("Error opening file");
 
                } else {
 
                    fgets(du_sum, 100, pFile);
 
                    string du_string = du_sum;
 
                    find_and_replace(du_string, check_dir, "");
 
                    whitespace(du_string);
 
                    string total_bytes;
 
                    getline(du_string,total_bytes);
 
                    //find_and_replace(du_string, "\n", "");
 
                    string cmd_server_status_mysql = (total_bytes);
 
                printf(cmd_server_status_mysql.c_str());
 
                }
 
            pclose(pFile);

Thank you..

try to use getline without the functions before it will it work or not????

[Ganon11]

If you are using C++, why are you using FILE* and legacy C functions? Try ifstreams and ofstreams, which will act live cin and cout with files. Much easier to work with.