Errors from running code compiled by gcc
So I just installed Ubuntu 18.04 on my (not so shiny) new thinkpad and I'm loving it, especially the new GNOME getup.
So I was looking to run some c++ code. Seems gcc is already installed by default so I try out a simple hello world program called test.cpp
I compile it: cpp test.cpp -o test ... works fine no errors.
I then try to run it but it says permission denied, so I do a quick chmod u+x and it seems to at least try to run the program. No matter what code I put in and compile, it always comes with these errors:
./test: line 18: namespace: command not found
./test: line 22: syntax error near unexpected token `('
./test: line 22: ` typedef decltype(nullptr) nullptr_t;'
--Also note that there are only 7 lines of code and it gives me an error for line 18+?! Also why is it giving me errors after I compiled it?!
So I made a new account on #askubuntu and here I am now.
18.04 compiling gcc
asked 6 hours ago
armand de bruijnarmand de bruijn
1
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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So I just installed Ubuntu 18.04 on my (not so shiny) new thinkpad and I'm loving it, especially the new GNOME getup.
So I was looking to run some c++ code. Seems gcc is already installed by default so I try out a simple hello world program called test.cpp
I compile it: cpp test.cpp -o test ... works fine no errors.
I then try to run it but it says permission denied, so I do a quick chmod u+x and it seems to at least try to run the program. No matter what code I put in and compile, it always comes with these errors:
./test: line 18: namespace: command not found
./test: line 22: syntax error near unexpected token `('
./test: line 22: ` typedef decltype(nullptr) nullptr_t;'
--Also note that there are only 7 lines of code and it gives me an error for line 18+?! Also why is it giving me errors after I compiled it?!
So I made a new account on #askubuntu and here I am now.
18.04 compiling gcc
asked 6 hours ago
armand de bruijnarmand de bruijn
1
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If your test is really c++ code, you should install and use the g++ compiler, not the gcc compiler.
– ubfan1
6 hours ago
oh sorry by gcc I meant the gcc compiler collection which is pre-installed on Ubuntu, to actually compile the code I used cpp which is part of gcc
– armand de bruijn
3 hours ago
Yes I see what you mean, but I can assure you that i typed the command ./test rather than ./test.cpp. @steeldriver
– armand de bruijn
3 hours ago
add a comment |
So I just installed Ubuntu 18.04 on my (not so shiny) new thinkpad and I'm loving it, especially the new GNOME getup.
So I was looking to run some c++ code. Seems gcc is already installed by default so I try out a simple hello world program called test.cpp
I compile it: cpp test.cpp -o test ... works fine no errors.
I then try to run it but it says permission denied, so I do a quick chmod u+x and it seems to at least try to run the program. No matter what code I put in and compile, it always comes with these errors:
./test: line 18: namespace: command not found
./test: line 22: syntax error near unexpected token `('
./test: line 22: ` typedef decltype(nullptr) nullptr_t;'
--Also note that there are only 7 lines of code and it gives me an error for line 18+?! Also why is it giving me errors after I compiled it?!
So I made a new account on #askubuntu and here I am now.
18.04 compiling gcc
asked 6 hours ago
armand de bruijnarmand de bruijn
1
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
So I just installed Ubuntu 18.04 on my (not so shiny) new thinkpad and I'm loving it, especially the new GNOME getup.
So I was looking to run some c++ code. Seems gcc is already installed by default so I try out a simple hello world program called test.cpp
I compile it: cpp test.cpp -o test ... works fine no errors.
I then try to run it but it says permission denied, so I do a quick chmod u+x and it seems to at least try to run the program. No matter what code I put in and compile, it always comes with these errors:
./test: line 18: namespace: command not found
./test: line 22: syntax error near unexpected token `('
./test: line 22: ` typedef decltype(nullptr) nullptr_t;'
--Also note that there are only 7 lines of code and it gives me an error for line 18+?! Also why is it giving me errors after I compiled it?!
So I made a new account on #askubuntu and here I am now.
18.04 compiling gcc
18.04 compiling gcc
asked 6 hours ago
armand de bruijnarmand de bruijn
1
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 6 hours ago
armand de bruijnarmand de bruijn
1
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 6 hours ago
armand de bruijnarmand de bruijn
1
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 6 hours ago
armand de bruijnarmand de bruijn
1
asked 6 hours ago
armand de bruijnarmand de bruijn
1
1
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
armand de bruijn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If your test is really c++ code, you should install and use the g++ compiler, not the gcc compiler.
– ubfan1
6 hours ago
oh sorry by gcc I meant the gcc compiler collection which is pre-installed on Ubuntu, to actually compile the code I used cpp which is part of gcc
– armand de bruijn
3 hours ago
Yes I see what you mean, but I can assure you that i typed the command ./test rather than ./test.cpp. @steeldriver
– armand de bruijn
3 hours ago
add a comment |
If your test is really c++ code, you should install and use the g++ compiler, not the gcc compiler.
– ubfan1
6 hours ago
oh sorry by gcc I meant the gcc compiler collection which is pre-installed on Ubuntu, to actually compile the code I used cpp which is part of gcc
– armand de bruijn
3 hours ago
Yes I see what you mean, but I can assure you that i typed the command ./test rather than ./test.cpp. @steeldriver
– armand de bruijn
3 hours ago
If your test is really c++ code, you should install and use the g++ compiler, not the gcc compiler.
– ubfan1
6 hours ago
If your test is really c++ code, you should install and use the g++ compiler, not the gcc compiler.
– ubfan1
6 hours ago
oh sorry by gcc I meant the gcc compiler collection which is pre-installed on Ubuntu, to actually compile the code I used cpp which is part of gcc
– armand de bruijn
3 hours ago
oh sorry by gcc I meant the gcc compiler collection which is pre-installed on Ubuntu, to actually compile the code I used cpp which is part of gcc
– armand de bruijn
3 hours ago
Yes I see what you mean, but I can assure you that i typed the command ./test rather than ./test.cpp. @steeldriver
– armand de bruijn
3 hours ago
Yes I see what you mean, but I can assure you that i typed the command ./test rather than ./test.cpp. @steeldriver
– armand de bruijn
3 hours ago
add a comment |
1 Answer
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oldest
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cpp is the C pre-processor - it is not a compiler. Its output is a text file containing expanded macros and declarations from any files that your code has #includeed. When you made it executable and tried to run it, your shell made an attempt to interpret this text as shell code - and failed.
To compile your C++ file (and link into an executable) you should use g++ instead:
g++ test.cpp -o test
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
votes
active
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votes
cpp is the C pre-processor - it is not a compiler. Its output is a text file containing expanded macros and declarations from any files that your code has #includeed. When you made it executable and tried to run it, your shell made an attempt to interpret this text as shell code - and failed.
To compile your C++ file (and link into an executable) you should use g++ instead:
g++ test.cpp -o test
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
add a comment |
cpp is the C pre-processor - it is not a compiler. Its output is a text file containing expanded macros and declarations from any files that your code has #includeed. When you made it executable and tried to run it, your shell made an attempt to interpret this text as shell code - and failed.
To compile your C++ file (and link into an executable) you should use g++ instead:
g++ test.cpp -o test
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
add a comment |
cpp is the C pre-processor - it is not a compiler. Its output is a text file containing expanded macros and declarations from any files that your code has #includeed. When you made it executable and tried to run it, your shell made an attempt to interpret this text as shell code - and failed.
To compile your C++ file (and link into an executable) you should use g++ instead:
g++ test.cpp -o test
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
cpp is the C pre-processor - it is not a compiler. Its output is a text file containing expanded macros and declarations from any files that your code has #includeed. When you made it executable and tried to run it, your shell made an attempt to interpret this text as shell code - and failed.
To compile your C++ file (and link into an executable) you should use g++ instead:
g++ test.cpp -o test
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
answered 25 mins ago
steeldriversteeldriver
68.9k11113184
68.9k11113184
add a comment |
add a comment |
armand de bruijn is a new contributor. Be nice, and check out our Code of Conduct.
armand de bruijn is a new contributor. Be nice, and check out our Code of Conduct.
armand de bruijn is a new contributor. Be nice, and check out our Code of Conduct.
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If your test is really c++ code, you should install and use the g++ compiler, not the gcc compiler.
– ubfan1
6 hours ago
oh sorry by gcc I meant the gcc compiler collection which is pre-installed on Ubuntu, to actually compile the code I used cpp which is part of gcc
– armand de bruijn
3 hours ago
Yes I see what you mean, but I can assure you that i typed the command ./test rather than ./test.cpp. @steeldriver
– armand de bruijn
3 hours ago