no output in console window:codeblocks

Question

Heya I have installed codeblocks..on windows7 codeblocks-13.12mingw-setup-TDM-GCC-481.exe my program is building but after executing i am getting a console window only with a cursor and no output. I tried it with many other programs but the same thing is happening. I have also set all the settings to default and have also re installed codeblocks. I am attaching snippet of the console window for the program code:

#include <stdio.h>

int main()
{
   printf("helloworld%s")
   return 0;
 }

Even the default program was not working because it failed to recognize iostream. PLease help..!

1 - that code won't even compile due to the missing `;` after the printf line (and no compilation, no execution and thus no output so that might be your first problem), but even if it would compile 2 - `"helloworld%s"` is invalid as you fail to pass an extra string argument — fvu, Dec 23 '15 at 11:41
you can `#include ` and print `std::cout << "helloworld" << std::endl;` — gomons, Dec 23 '15 at 11:41
@BoPersson yes i use avast antivirus but i tried to execute by switching it off temporarily still no help! — varshika03, Dec 25 '15 at 08:20
@fvu thanks for it i removed%s and also put a semicolon still it compiled but didn't show output! — varshika03, Dec 25 '15 at 08:21
@gomons compiler is failing to recognise iostream thereby i shifted to stdio.h — varshika03, Dec 25 '15 at 08:22
"compiler is failing to recognize iostream" - is your file called somethign ending in `.cpp` ? — M.M, Dec 25 '15 at 11:36

score 1 · Answer 1 · edited May 23 '17 at 12:04

You forgot the ; at the end of the printf() line, you should have a syntax error when compiling.
The %s doesn't mean any sense if there is no additionnal argument. It is used when you want to print a string stored in a variable. Example:

int main(int argc, char** argv) { char str[] = "world!"; printf("Hello %s\n", str); }

will print "Hello world!".

Unless you know what you're doing, you should add a \n at the end of the printed line (before output on stdout are buffered, and printed when the buffer is full : Is stdout line buffered, unbuffered or indeterminate by default?)

no output in console window:codeblocks

1 Answers1