1.思维导图

2.

 #ifndef _HEAD_H_                                                                   
 #define _HEAD_H_
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <errno.h>
 #define PRINT_ERROR(mesg) do{perror(mesg);return -1;}while(0) 
 #endif 
int main(int argc, const char *argv[])
{
      
    FILE* fp=fopen("./time.txt","a+");
    if(fp==NULL)
    {
        PRINT_ERROR("fopen");
    }    
    int count=0;
    char buf[128];
        while(fgets(buf,sizeof(buf),fp)!=0)
        {
            count++;
        }
    printf("%d\n",count);
 
    fclose(fp);
    while(1)
    {
    FILE* fp=fopen("./time.txt","a+");
    time_t t=time(NULL);  
    struct tm *now=localtime(&t);
    
        
        count++;
        if(now==NULL)
            PRINT_ERROR("localtime error");
        fprintf(fp,"%d %d-%d-%d %02d:%02d:%02d\n",count,now->tm_year+1900,now->tm_mon+1,now->tm_mday,now->tm_hour,now->tm_min,now->tm_sec);
        printf("%d %d-%d-%d %02d:%02d:%02d\n",count,now->tm_year+1900,now->tm_mon+1,now->tm_mday,now->tm_hour,now->tm_min,now->tm_sec);
    fclose(fp);
        
        sleep(1);
    }
 
    return 0;
}


                        

3.

 #ifndef _HEAD_H_                                                                   
 #define _HEAD_H_
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <errno.h>
 #define PRINT_ERROR(mesg) do{perror(mesg);return -1;}while(0) 
 #endif                                                                             
 int main() {
     FILE* fp=fopen("~/图片/'2025-03-04 01-13-52 的屏幕截图.png'","r");
     if(fp==NULL)
     {
         PRINT_ERROR("fopen");
     }
     FILE* fp2=fopen("~/图片/'2025-03-04 01-13-52 的屏幕截图.png'","w");
     if(fp2==NULL)
     {
         PRINT_ERROR("fopen");
     }    
     char buf[128]={0};
     while(fread(buf,sizeof(buf),1,fp)!=0)
     {
         if(fwrite(buf,sizeof(buf),1,fp2)==0)
             return -1;
     }
 
     fclose(fp);
     fclose(fp2);
  
     printf("FINISH\n");
  
  
     return 0;
 }