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  1. #include <stdio.h>
  2.  
  3. /* a global variable, does not belong to any function */
  4. /* It is initialized to zero automatically            */
  5. /* It can be any valid C variable name.               */
  6. int globalValue;
  7.  
  8. // ***************************************************
  9. // Function:  somefunc
  10. // 
  11. // Description: Updates a global variable
  12. //
  13. // Parameter: number - an integer number
  14. //
  15. // Returns:  void (global variable is updated)
  16. // ***************************************************
  17.  
  18. void somefunc (int number)
  19. {
  20.     int answer;  /* squared value */
  21.  
  22.     globalValue *= 10;  /* update global var */
  23.  
  24.     answer = globalValue * globalValue; /* use it */
  25.  
  26. }
  27.  
  28. int main ( )
  29. {
  30.     int localValue;  /* a local variable value */
  31.  
  32.     globalValue += 10;  /* add 10 to globalValue */
  33.  
  34.     localValue = globalValue;  /* set values to it */
  35.  
  36.     somefunc (localValue);
  37.  
  38.     printf("localValue = %i, globalValue = %i\n", localValue, globalValue);
  39.  
  40.     return (0);
  41. }
  42.  
Success #stdin #stdout 0.01s 5224KB
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Standard input is empty
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localValue = 10, globalValue = 100
https://ideone.com/P2uuAv
language:
C (gcc 8.3)
created:
2 hours ago
visibility:
public

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