// Some more complex constant variable/pointer declaration.
// Observing cases when we get error and warning would help
// understanding it better.
int main(void)
{
char ca1[10]= "aaaa"; // char array 1
char ca2[10]= "bbbb"; // char array 2
char *pca1= ca1;
char *pca2= ca2;
char const *ccs= pca1;
char * const csc= pca2;
ccs[1]='m'; // Bad - error: assignment of read-only location ‘*(ccs + 1u)’
ccs= csc; // Good
csc[1]='n'; // Good
csc= ccs; // Bad - error: assignment of read-only variable ‘csc’
char const **ccss= &ccs; // Good
char const **ccss1= &csc; // Bad - warning: initialization from incompatible pointer type
char * const *cscs= &csc; // Good
char * const *cscs1= &ccs; // Bad - warning: initialization from incompatible pointer type
char ** const cssc= &pca1; // Good
char ** const cssc1= &ccs; // Bad - warning: initialization from incompatible pointer type
char ** const cssc2= &csc; // Bad - warning: initialization discards ‘const’
// qualifier from pointer target type
*ccss[1]= 'x'; // Bad - error: assignment of read-only location ‘**(ccss + 8u)’
*ccss= ccs; // Good
*ccss= csc; // Good
ccss= ccss1; // Good
ccss= cscs; // Bad - warning: assignment from incompatible pointer type
*cscs[1]= 'y'; // Good
*cscs= ccs; // Bad - error: assignment of read-only location ‘*cscs’
*cscs= csc; // Bad - error: assignment of read-only location ‘*cscs’
cscs= cscs1; // Good
cscs= cssc; // Good
*cssc[1]= 'z'; // Good
*cssc= ccs; // Bad - warning: assignment discards ‘const’
// qualifier from pointer target type
*cssc= csc; // Good
*cssc= pca2; // Good
cssc= ccss; // Bad - error: assignment of read-only variable ‘cssc’
cssc= cscs; // Bad - error: assignment of read-only variable ‘cssc’
cssc= cssc1; // Bad - error: assignment of read-only variable ‘cssc’
}