网站开发技术题目,wordpress批量添加图片链接,陆家网站建设,伽师网站建设说起队列和栈#xff0c;链表动态内存分配的方式#xff0c;是比较常见的方式#xff0c;最近项目下需要在dsp上面使用队列和栈两种数据结构#xff0c;所有就使用链表动态内存分配的方式实现了一下#xff0c;但是调试的过程中发现运行的时候总是在动态内存分配的位置出b… 说起队列和栈链表动态内存分配的方式是比较常见的方式最近项目下需要在dsp上面使用队列和栈两种数据结构所有就使用链表动态内存分配的方式实现了一下但是调试的过程中发现运行的时候总是在动态内存分配的位置出bug动态内存分配malloc总是分配失败返回空指针尝试修改cmd的配置后也仍然没有解决问题。思来想去还是用数组的方式来实现队列和栈结果性能出奇的稳定所以本博客记录一下用数组实现队列和栈的代码。 队列
queue.h
#ifndef USERPROGRAM_QUEUE_QUEUE_H_
#define USERPROGRAM_QUEUE_QUEUE_H_#include main.h#define QUEUE_MAX_SIZE 500
/*--------------- 单个Uint16队列 ---------------*/
typedef struct _queue{int size;int front;int rear;Uint16 data[QUEUE_MAX_SIZE];
} queue;void queue_init(queue *q);
int enqueue(queue *q, Uint16 value);
int dequeue(queue *q, Uint16 *value);
int is_queue_empty(queue *q);extern queue scib_rx_queue;
extern queue scib_tx_queue;#endif /* USERPROGRAM_QUEUE_QUEUE_H_ */queue.c
#include queue.hqueue scib_rx_queue;
queue scib_tx_queue;void queue_init(queue *q){q-size 0;q-front 0;q-rear -1;
}int enqueue(queue *q, Uint16 value){if(q-size QUEUE_MAX_SIZE){return 0;}q-rear;q-data[q-rear] value;q-size;return 1;}int dequeue(queue *q, Uint16 *value){if(q-size 0){return 0;}*value q-data[q-front];q-front;q-size--;// 初始化 如果是实时系统里面一直用队列初始化非常的关键if(q-size0){q-front 0;q-rear -1;}return 1;
}int is_queue_empty(queue *q){return (q-size0);
}栈
stack.h
#ifndef USERPROGRAM_STACK_STACK_H_
#define USERPROGRAM_STACK_STACK_H_#include main.h#define STACK_MAX_SIZE 500typedef struct _stack
{float data[STACK_MAX_SIZE]; //数组建立顺序栈int top;//栈中元素个数
}stack;extern stack input_compute_stack;
extern stack output_compute_stack;void stack_init(stack* s);
int is_stack_empty(stack* s);
int enstack(stack* s, float value);
int destack(stack* s, float * value);
void clearstack(stack* s);float computeformula(stack *s, float* constant_value, float* ch_value, Uint16* compute_rule, int N, int * ret);#pragma CODE_SECTION(computeformula,ramfuncs);#endif /* USERPROGRAM_STACK_STACK_H_ */stack.c
#include stack.hstack input_compute_stack;
stack output_compute_stack;void stack_init(stack* s){s-top 0;
}int is_stack_empty(stack* s){return (s-top0);
}int enstack(stack* s, float value){if (s-top STACK_MAX_SIZE){return 0;}else{s-data[s-top] value;s-top;return 1;}
}int destack(stack* s, float * value)
{if (s-top 0){return 0;}else{s-top--;*value s-data[s-top];return 1;}
}void clearstack(stack* s){s-top 0;
}float computeformula(stack *s, float* constant_value, float* ch_value, Uint16* compute_rule, int N, int * ret){int i;float result 0;float operator1 0;float operator2 0;int stack_pop_ret1 1;int stack_pop_ret2 1;int stack_push_ret 1;for(i 0; i N; i){switch (compute_rule[i]){case ADD:stack_pop_ret1 destack(s, operator1);stack_pop_ret2 destack(s, operator2);result operator2 operator1;stack_push_ret enstack(s, result);if(stack_pop_ret10 || stack_pop_ret20 || stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case SUBSTRACT:stack_pop_ret1 destack(s, operator1);stack_pop_ret2 destack(s, operator2);result operator2 - operator1;stack_push_ret enstack(s, result);if(stack_pop_ret10 || stack_pop_ret20 || stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case MULTIPLY:stack_pop_ret1 destack(s, operator1);stack_pop_ret2 destack(s, operator2);result operator2 * operator1;stack_push_ret enstack(s, result);if(stack_pop_ret10 || stack_pop_ret20 || stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case DIVIDE:stack_pop_ret1 destack(s, operator1);stack_pop_ret2 destack(s, operator2);if(stack_pop_ret10 || stack_pop_ret20 || operator1 0){*ret 0;clearstack(s);return 0;}else{result operator2 / operator1;stack_push_ret enstack(s, result);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}}break;case CH1_P:stack_push_ret enstack(s, ch_value[0]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH2_P:stack_push_ret enstack(s, ch_value[1]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH3_P:stack_push_ret enstack(s, ch_value[2]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH4_P:stack_push_ret enstack(s, ch_value[3]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH5_P:stack_push_ret enstack(s, ch_value[4]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH1_N:stack_push_ret enstack(s, -ch_value[0]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH2_N:stack_push_ret enstack(s, -ch_value[1]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH3_N:stack_push_ret enstack(s, -ch_value[2]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH4_N:stack_push_ret enstack(s, -ch_value[3]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CH5_N:stack_push_ret enstack(s, -ch_value[4]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CONSTANT1:stack_push_ret enstack(s, constant_value[0]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CONSTANT2:stack_push_ret enstack(s, constant_value[1]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CONSTANT3:stack_push_ret enstack(s, constant_value[2]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CONSTANT4:stack_push_ret enstack(s, constant_value[3]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;case CONSTANT5:stack_push_ret enstack(s, constant_value[4]);if(stack_push_ret0){*ret 0;clearstack(s);return 0;}break;default:break;}}clearstack(s);*ret 1;return result;}
