Just started to learn programming language and now I'm learning C. When I run this simple code, my CodeBlocks app keeps failing to execute the code. Here is the code I wrote:
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
printf("Hello world!\n");
printf("Hello world!\n");
printf("Hello world!\n");
return 0;
}
This is the result after I clicked the run button:
Hello world!
Process returned 0 (0x0) execution time : 0.016 s
Press any key to continue.
Any idea why does my CodeBlocks app keep failing to execute code?
You should compile, then run the app, for a shortcut, press F9.
Press this
or this:
Related
I've recently downlaoded code blocks for mac and for some reason my code compiles with no errors but when I try to run it in terminal to see if it prints it doesn't print anything. This is my code. I have already downloaded x code and my program is able to build in code blocks but print f will not work. Can someone please give a solution to this problem.
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
I am not sure why my program is not showing "Hello World". I am trying by executing only printf(). Is there anything I am missing here?
Below is my complete program
#include <stdio.h>
int main()
{
printf("Hello World");
return 0;
}
My guess is that the console window which contains the output flashes by so quickly that you don't have time to see it. You need to put in something to halt the program so you can see the output. One way of doing it is to ask the user to press the Enter key.
Something like
#include <stdio.h>
int main(void)
{
printf("Hello World\n");
printf("Press the Enter key to continue\n");
(void) getc(stdin);
return 0;
}
In this program, I am trying to use fork() functions to create 6 child processes and execute executionnode() functions,but I feel there is something wrong in my output!
what happened to my code or system calls?
I have a program like this
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
int executionnode(int i);
int main(){
pid_t childpid;
int i;
int row=6;
for(i=0;i<row;i++)
{ childpid=fork();
if(childpid==0)
continue;
else if (childpid>0)
executionnode(i);
else {
perror("something wrong");
exit(1);
}
}
}
int executionnode(int i){
sleep(i);
printf("hello, I am process:%ld\n",(long)getpid());
char *execArgs[] = { "echo", "Hello, World!", NULL };
execvp("echo", execArgs);
}
Everytime when I run this program,the output is always like this in my Linux terminal:
/*
hello, I am process:3226
Hello, World!
lixx3527#tiandiao123:~/Desktop/pa1-release$ hello, I am process:3227
Hello, World!
hello, I am process:3228
Hello, World!
hello, I am process:3229
Hello, World!
hello, I am process:3230
Hello, World!
hello, I am process:3231
Hello, World!
*/
I find my output even didn't finish, which means my program's executions haven't been finished, but lixx3527#tiandiao123:~/Desktop/pa1-release$ has appeared in the terminal ahead of time.
what happened to my code or system calls?
can someone help me explain it? I mean why lixx3527#tiandiao123:~/Desktop/pa1-release$ appeared before the program finished its all the execution?
thank you!
The parent runs very quickly, forking children. Then it quits and the shell prints a prompt. Then the other children run and print data. It looks like one child is able to print before the shell prints a prompt, and the others don't. If you want the parent to wait for the children to finish, there is a function conveniently named wait that will do that.
I've started to learn a C language and i am using netbeans IDE.
I tried the most simple classic = printing "Hello World".
code
int main(int argc, char** argv) {
printf('Hello World!');
return (EXIT_SUCCESS);
}
When i run projects, netbeans writes BUILD SUCCESSFUL (total time: ...)
but then it writes
read from master failed
: Input/output error
RUN FAILED (exit value 1, total time: 414ms)
How to make it work?
This is the Hello World program. It includes the relevant library header file. I added the newline with \n to ensure the output buffer is flushed.
#include<stdio.h>
int main(void) {
printf("Hello World!\n");
return 0;
}
Program output:
Hello World!
Your problem is coming from Netbeans IDE. Right click your project and go to properties. In the properties, click run and change the console type to standard output.
After downloading and installing Code::Blocks with MinGW, I just started a new console project on it and it created a main.c file with this content:
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
And it does compile. However, when I run it, no "Hello world!" is shown in the console and there is a message like
Process terminated with status 1993077897 (0 minutes, 3 seconds)
or
Process terminated with status -1073741510 (0 minutes, 7 seconds)
in the build log.
I can truly say that I just don't know what went wrong.
Problem solved: Kapersky was doing its job too well and blocked the process before it could even display a simple "Hello world". It warned me a long time after that, asking me repeatedly to delete the executable.
try:
int main(void)
{
printf("Hello World");
return 0;
}
I may be wrong, but i think the problem is in the main() i think you need to change that to main(void)
Just try this
Go to Settings->Compiler->Reset Defaults Hope it works!