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UNIX command line calls

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UNIX command line calls C programming forum discussing all C derivatives, including C#, C++, Object-C, and even plain old vanilla C. These languages are low level languages, and used on projects such as device drivers, compilers, and even whole computer operating systems.

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  #1  
Old July 1st, 2003, 11:30 PM
granmastaraj granmastaraj is offline
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UNIX command line calls
I have a question on calling a UNIX command from a C++ program. Suppose I want to use the command

" finger >temp.txt "

from a UNIX command line. How would I do this from a C++ program? I believe its system but I am not sure about the syntax. Can anybody help me out??? Thanks alot
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Old July 1st, 2003, 11:32 PM
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system("finger > temp.txt");

Woo hoo, I believe that's my 1000th post here
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Old July 1st, 2003, 11:42 PM
granmastaraj granmastaraj is offline
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Thats what I thought it was but when I tried my code on gcc compilier i get the following errors:

test.cpp: In function `int main(...)':
test.cpp:4: implicit declaration of function `int system(...)'

My code is this

#include<iostream>
void main()
{
system("finger > temp.txt");
}
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Old July 1st, 2003, 11:46 PM
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Add this line near the #include <iostream>
Code:
#include <cstdlib>
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Old July 1st, 2003, 11:48 PM
granmastaraj granmastaraj is offline
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AHHHHhh...so simple...thanks!!!!!
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