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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 c1, c2;
  9.     float a;
  10.  
  11.     printf("Enter value of a: ");
  12.     scanf("%f", &a);
  13.  
  14.     c1 = fork();
  15.  
  16.     if (c1 == 0)
  17.     {
  18.         printf("First Child (Circle)\n");
  19.         printf("Area of Circle = %.2f\n", 3.14 * a * a);
  20.         printf("Perimeter of Circle = %.2f\n", 2 * 3.14 * a);
  21.         return 0;
  22.     }
  23.  
  24.     c2 = fork();
  25.  
  26.     if (c2 == 0)
  27.     {
  28.         printf("Second Child (Square)\n");
  29.         printf("Area of Square = %.2f\n", a * a);
  30.         printf("Perimeter of Square = %.2f\n", 4 * a);
  31.         return 0;
  32.     }
  33.  
  34.     waitpid(c2, NULL, 0);  // Parent waits for square child only
  35.  
  36.     printf("Parent: Square child completed\n");
  37.  
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0s 5312KB
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stdin
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7.5
stdout
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Enter value of a: Second Child (Square)
Area of Square = 56.25
Perimeter of Square = 30.00
Enter value of a: Parent: Square child completed
https://ideone.com/Zz8j3V
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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