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  1. #include<stdio.h>
  2. #include<unistd.h>
  3. #include<sys/types.h>
  4. #include<sys/wait.h>
  5.  
  6. int main()
  7. {
  8.     pid_t pid;
  9.     int n;
  10.  
  11.     printf("Enter nice value for child:");
  12.     scanf("%d",&n);
  13.     pid=fork();
  14.  
  15.     if(pid<0)
  16.     {
  17.         printf("Fork Failed\n");
  18.     }
  19.     else if(pid==0)
  20.     {
  21.         printf("Child Process\n");
  22.         printf("Child PID:%d\n",getpid());
  23.         nice(n);
  24.         printf("Child value increased by %d\n",n);
  25.     }
  26.     else
  27.     {
  28.         wait(NULL);
  29.         printf("Parent Process\n");
  30.         printf("Parent PID:%d",getpid());
  31.     }
  32.     return 0;
  33. }
Success #stdin #stdout 0s 5288KB
comments (?)
stdin
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-1
stdout
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Enter nice value for child:Child Process
Child PID:3225647
Child value increased by -1
Enter nice value for child:Parent Process
Parent PID:3225643
https://ideone.com/vdehlF
language:
C (gcc 8.3)
created:
11 hours ago
visibility:
public

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