how to call .exe file within c++ program?

Question

I want to use a exe file (convert.exe), inside my C++ program. This "exe" file change my output file format to another format. when, i use this convert.exe from my command-prompt (cmd), i have to type like this;

convert -in myfile -out convertedfile -n -e -h

where;

myfile= name of the file, I obtain from my c++ program convertedfile= result of the "convert.exe" file -n, -e, -h = are some parameters (columns) that i need to use to get output file with my desired data columns.

i tried with system(convert.exe). but, it does not work as i did not know how to use all those parameters.

Answer 1

The std::system function expects a const char *, so how about you try

system("convert -in myfile -out convertedfile -n -e -h")

Then, if you want to be a little more flexible, you use std::sprintf can create a string with the right elements in it and then pass it to the system() function like so:

// create a string, i.e. an array  of 50 char
char command[50];  

// this will 'fill' the string command with the right stuff,
// assuming myFile and convertedFile are strings themselves
sprintf (command, "convert -in %s -out %s -n -e -h", myFile, convertedFile);   

// system call
system(command);