zài / chéng xù / zhōng / zhí xíng / jìn zhàn / cāo zuò / qián / xū yào / jiǎn chá / zhàn / shì fǒu / yǐ mǎn在程序中,执行进栈操作前需要检查栈是否已满。In a program, before performing a push operation, you need to check whether the stack is full.