#include "./stack.h" stack_t *stack_new(int size) { stack_t *stack = (stack_t *)malloc(sizeof(stack_t)); if (stack == NULL) return -1; stack->mem = (int *)malloc(sizeof(int) * size); if (stack->mem == NULL) return -1; stack->size = size; stack->cursor = -1; return stack; } int stack_push(stack_t *stack, int value) { if (stack->cursor > stack->size - 1) return 1; stack->mem[stack->cursor + 1] = value; stack->cursor += 1; return 0; } int stack_pop(stack_t *stack) { if (stack->cursor == -1) return 1; int value = stack->mem[stack->cursor]; stack->cursor -= 1; return value; } int stack_get(stack_t *stack, int pos) { if (pos < 0 || pos >= stack->size) return 1; return stack->mem[pos]; }