Operations on arrays

/* array.c  -- Operations on arrays
*/

#include <stdio.h>

int main(void) {
int a[2] = {1,2};  /* The aggregates like {1,2} are literals for arrays */
int b[2] = {2,3};
int i;

/* It is legal to use subscripts on arrays, both on the left and on 
* the right hand side of assignments. */
for(i=0;i<2;i++)
a[i]=b[i];

/* It is not legal to assign arrays, like in a=b; */

/* The comparison of two distinct arrays with the same content
* results in FALSE. So below we print "They are not equal"
*/
if(a==b)
printf("They are equal\n");
else
printf("They are not equal\n");

/* The following comparison results in TRUE. */
if(a==a)
printf("Of course a is equal to a\n");
else
printf("No, a is not equal to a\n");
/* The behavior of comparison is explained when we note that the
* comparison is a comparison of addresses, not contents.
*/
/* We cannot print out an array as a single unit. We have to print out
* its elements one at a time.
*/
for(i=0;i<2;i++)
printf("a[%1d] = %3d\n", i, a[i]);
}