#define MAX_LINE_LENGTH 1024 #define MAX_RECORDS 5 char command[] = "/usr/bin/sn_core.elf getstat 2>/dev/null"; char line[MAX_LINE_LENGTH]; const char *filename = "data.txt"; float temp; char *Temp[MAX_RECORDS] = {0}; int index = 0; void parse_temperature(char *line) { char *temp_str; char *token; // 解析温度 if ((temp_str = strstr(line, "temp: ")) != NULL) { temp_str += strlen("temp: "); temp = strtof(temp_str, NULL); } } void add_record(float temp) { if (index >= MAX_RECORDS) { free(Temp[0]); memmove(Temp, Temp + 1, (MAX_RECORDS - 1) * sizeof(char *)); index--; } Temp[index] = malloc(sizeof(float)); memcpy(Temp[index], &temp, sizeof(float)); index++; } void print_records() { for (int i = 0; i < index; i++) { printf("%f\n", *((float *)Temp[i])); } } int main() { FILE *fp,*fd; while (1) { fp = popen(command, "r"); if(fp == NULL){ printf("Error running command.\n"); exit(1); } fd = fopen(filename,"w"); if(fd == NULL){ printf("Error open file!\n"); exit(1); } while (fgets(line, MAX_LINE_LENGTH, fp) != NULL) { //printf("%s\n",line); parse_temperature(line); } pclose(fp); add_record(temp); //print_records(); sleep(1); } return 0; } 优化代码 并将Temp[]数组里的值写入data.text文本中

以下是对代码的优化，并将Temp[]数组里的值写入data.txt文本中的修改：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define MAX_LINE_LENGTH 1024 
#define MAX_RECORDS 5 

char command[] = "/usr/bin/sn_core.elf getstat 2>/dev/null";
char line[MAX_LINE_LENGTH];
const char *filename = "data.txt";

float temp;
float *Temp[MAX_RECORDS] = {0};
int index = 0;

void parse_temperature(char *line) {
    char *temp_str;
    // 解析温度
    if ((temp_str = strstr(line, "temp: ")) != NULL) {
        temp_str += strlen("temp: ");
        temp = strtof(temp_str, NULL);
    }
}

void add_record(float temp) {
    if (index >= MAX_RECORDS) {
        free(Temp[0]);
        memmove(Temp, Temp + 1, (MAX_RECORDS - 1) * sizeof(float *));
        index--;
    }
    Temp[index] = malloc(sizeof(float));
    memcpy(Temp[index], &temp, sizeof(float));
    index++;
}

void print_records() {
    FILE *fd = fopen(filename,"w");
    if(fd == NULL){
        printf("Error open file!\n");
        exit(1);
    }
    for (int i = 0; i < index; i++) {
        fprintf(fd, "%f\n", *(Temp[i]));
    }
    fclose(fd);
}

int main() {
    while (1) {
        FILE *fp = popen(command, "r");
        if(fp == NULL){
            printf("Error running command.\n");
            exit(1);
        }
        while (fgets(line, MAX_LINE_LENGTH, fp) != NULL) {
            //printf("%s\n",line);
            parse_temperature(line);
        }
        pclose(fp);
        add_record(temp);
        print_records();
        sleep(1);
    }
    return 0;
}

对代码进行的优化包括：

1. 将Temp数组的类型从`char *`改为`float *`，使其更符合实际存储的数据类型；
2. 将文件操作放在`print_records`函数中进行，使得代码更加模块化和可读性更高；
3. 在打开文件时检查是否成功打开，避免出现文件操作错误导致程序异常退出。