How do I access variables in C from different functions? -

my question how function malloc_queue() can access variables init_queue() without giving arguments!

for example:

the main.c:

if (init_queue()) {     malloc_queue() } 

init_queue() creates variable que:

int init_queue{     struct queue *que;     return 1; } 

malloc_queue() want variable que init_queue():

void malloc_queue{     struct queue *que = (struct queue*)malloc(sizeof(struct queue));     return; } 

but doesnt work since malloc_queue doesnt know que is. there possible ways without giving arguments?

maybe want static variable outside functions, has scope inside residing file after definition.

check code:

#include <stdio.h>  static int x = 0; void a() {     x = 5; } void b() {     x*=2; } int main(int argc, char * argv[]) {     printf("%d\n", x);      a();     printf("%d\n", x);      b();     printf("%d\n", x);      return 0; } 

just comments suggested, read c scopes.

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if need declare struct other primary types, might need declare pointer structure static variable outside function, allocate memory (e.g malloc()) inside 1 of functions.