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#include <stdio.h>
#define TRUE (1)
#define FALSE (0)
#define SIZE (10)
int topo=0;
void inc_topo(void){
topo++;
}
void dec_topo(void){
topo--;
}
int get_topo(void){
return topo;
}
int stack_empty(void){
(topo==0) ? TRUE : FALSE;
}
int push(int *stack, int x){
if (topo==SIZE) {
printf("stack overflow\n");
return -1;
} else {
stack[get_topo()] = x;
printf("push: stack[%d] = %d\n", get_topo(), stack[get_topo()]);
inc_topo();
}
}
int pop(int *stack){
if (get_topo()==0) {
printf("stack underflow\n");
return -1;
} else {
dec_topo();
printf("pop: stack[%d] = %d\n", get_topo(), stack[get_topo()]);
return stack[get_topo()];
}
}
int main(void) {
int arr[SIZE];
push(arr,3);
push(arr,4);
push(arr,5);
push(arr,1);
push(arr,9);
push(arr,10);
push(arr,6);
push(arr,12);
push(arr,15);
push(arr,8);
push(arr,20);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
pop(arr);
}
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