Defining an array in C

  • Syntax to define an array in C: 

          dataType  arrayName[ arraySize ];

  • Example: the definition double a[10] will reserve memory for 10 consecutive double type variables:

Using an array in C

  • Accessing array elements in C uses the same syntax as Java: 

       arrayName[ i ]   is the ith element in the array "arrayName"

  • Example program using an array: 

     #include <stdio.h>

 int main( int argc, char *argv[] )
 {
    int A[10], i;

    for (i = 0; i < 10; i++ )
       A[i] = i*i;           // Assign a value to A[i] 

    for (i = 0; i < 10; i++ )
       printf("%d\n", A[i]); // Using the value in A[i] 
 }

DEMO: demo/C/set1/array1.c