Consider the following C program: void fun(void) { int a, b, c; /* definition 1 */ ... while (...) { int b, c, d; /* definition 2 */ ... < 1 while (...) { int c, d, e; /* definition 3 */ ... < 2 } ... < 3 }... < 4 } For each of the four marked points in this function, list each visible variable, along with the number of the definition statement that defines it.

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Explanation:

1.

void func(void){

int a,b,c; /*definition 1*/

* a,b,c for definition 1 are visible */

d, e are not visible

while(...){

int b, c, d; /* definition 2*/

*

a from definition 1 is visible

b, c, d from definition 2 are visible

*/ ///

while(...){

int c, d, e;/* definition 3*/

*

a from definition 1 is visible

b from definition 2 is visible

c, d, e from definition 3 are visible

*/ ///

}

*

a from definition 1 is visible

b, c, d from definition 2 are visible

e not visible

*

}

* a,b,c for definition 1 are visible */

d, e are not visible

}