Question

Consider the following 3 programs: 123 //contents of file foo.c: static int a = 5; int main() { f(); return 0; } //contents of file bar.c: static int a = 10; void f() { printf("%d\n", a); } //contents of file foo.c: int a = 5; int main() { f(); return 0; } //contents of file bar.c: static int a = 10; void f() { printf("%d\n", a); } //contents of file foo.c: int a = 5; int main() { f(); return 0; } //contents of file bar.c: extern int a; void f() { printf("%d\n", a); } If the command "gcc foo.c bar.c" is executed, which of the above programs do not result in a linker error?

          Consider the following 3 programs:
123
//contents of file foo.c: static int a = 5; int main() { f(); return 0; } //contents of file bar.c: static int a = 10; void f() { printf("%d\n", a); }
//contents of file foo.c: int a = 5; int main() { f(); return 0; } //contents of file bar.c: static int a = 10; void f() { printf("%d\n", a); }
//contents of file foo.c: int a = 5; int main() { f(); return 0; } //contents of file bar.c: extern int a; void f() { printf("%d\n", a); }
If the command "gcc foo.c bar.c" is executed, which of the above programs do not result in a linker error?

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Added by Francisco N.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Akash M

10/06/2023

Step 1

- In `foo.c`, `static int a = 5;` declares a static variable `a` that is only visible within `foo.c`. - In `bar.c`, `static int a = 10;` declares another static variable `a` that is only visible within `bar.c`. - The function `f()` in `bar.c` tries to print `a`, Show more…

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Consider the following 3 programs: 123 //contents of file foo.c: static int a = 5; int main() { f(); return 0; } //contents of file bar.c: static int a = 10; void f() { printf("%d\n", a); } //contents of file foo.c: int a = 5; int main() { f(); return 0; } //contents of file bar.c: static int a = 10; void f() { printf("%d\n", a); } //contents of file foo.c: int a = 5; int main() { f(); return 0; } //contents of file bar.c: extern int a; void f() { printf("%d\n", a); } If the command "gcc foo.c bar.c" is executed, which of the above programs do not result in a linker error?

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