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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <pthread.h>
  4.  
  5. // Function executed by each thread
  6. void* thread_function(void* arg) {
  7.     int thread_num = *(int*)arg;  // get thread number from argument
  8.     printf("Hello from Thread %d! (Thread ID: %lu)\n", thread_num, pthread_self());
  9.     return NULL;
  10. }
  11.  
  12. int main() {
  13.     int num_threads = 5;                // Number of threads to create
  14.     pthread_t threads[num_threads];     // Thread handles
  15.     int thread_args[num_threads];       // Arguments for each thread
  16.  
  17.     // Create multiple threads
  18.     for (int i = 0; i < num_threads; i++) {
  19.         thread_args[i] = i + 1;  // Thread numbering starts from 1
  20.         if (pthread_create(&threads[i], NULL, thread_function, &thread_args[i]) != 0) {
  21.             perror("Failed to create thread");
  22.             exit(1);
  23.         }
  24.     }
  25.  
  26.     // Wait for all threads to finish
  27.     for (int i = 0; i < num_threads; i++) {
  28.         pthread_join(threads[i], NULL);
  29.     }
  30.  
  31.     printf("All threads have finished execution.\n");
  32.     return 0;
  33. }
  34.  
Success #stdin #stdout 0.01s 5324KB
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stdin
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Standard input is empty
stdout
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Hello from Thread 5! (Thread ID: 23108288497408)
Hello from Thread 4! (Thread ID: 23108290598656)
Hello from Thread 3! (Thread ID: 23108292699904)
Hello from Thread 2! (Thread ID: 23108294801152)
Hello from Thread 1! (Thread ID: 23108296902400)
All threads have finished execution.
https://ideone.com/ykyXsB
language:
C (gcc 8.3)
created:
2 hours ago
visibility:
public

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