To prevent an array argument from being altered in a function, use the const qualifier. - C Function

Description

To prevent an array argument from being altered in a function, use the const qualifier.

Demo Code

#include <stdio.h> 
void printArray(const int []); 

int main() { //from w w w  .  ja  va2  s.  c  om
   int iNumbers[3] = {2, 4, 6}; 
   printArray(iNumbers); 
   return 0;
}
 
void printArray(const int num[]) //pass by reference, but read-only 
{ 
   int x; 
   printf("\nArray contents are: "); 
   
   for ( x = 0; x < 3; x++ ) 
      printf("%d ", num[x]); 
}

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