c++ - Running external executable in Qt using QProcess -


i'm trying run external executable (code below) in qt separate process.

test.c:

#include <stdio.h> int main () {     file *f;     f = fopen("a.txt", "w");     fprintf(f, "1\n");     fclose(f);     return 1; }

and in qt have:

qprocess* process = new qprocess(); qstring program = "/users/myuser/desktop/a.out"; process->execute(program);

i've read on differences between execute(), start(), , startdetached() , understanding want use execute() because want process running external executable finish before continuing execution in main process. i've tried 3 expecting find file a.txt containing text "1" in it, doesn't exist. or suggestions why it's not working? thanks!

check in main() -function a.txt -file exists , open before writing it.

check in qt "program" -file exists before executing it.

return different result codes main() -function , check result in qt:

qprocess *proc = new qprocess();  proc->start(program); proc->waitforfinished();  qstring result=proc->readallstandardoutput();  // check result here

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