C语言经典100例95

　　题目 91
　　题目： 时间函数举例1 #include #include   //  涉及到时间函数的部分，这里给出资料。 // (主要我并没有深入了解这些东西   int main() {     time_t lt;// 定义一个时间变量      lt = time(NULL);// 系统时间与日期     printf(ctime(<));// 英文的时间格式     printf(asctime(localtime(<)));//      printf(asctime(gmtime(<)));  } // asctime() : https://www.runoob.com/cprogramming/c-function-asctime.html // ctime(): https://www.runoob.com/cprogramming/c-function-ctime.html // localtime(): https://www.runoob.com/cprogramming/c-function-localtime.html  // gmtime(): https://www.runoob.com/cprogramming/c-function-gmtime.html   题目 92
　　题目： 时间函数举例2 #include #include #define R register  // 计算程序运行时间,之前提到过的   int main() {     // 这里与之前的不同，这里是通过本地时间计算的运行时间      time_t start_time,end_time;     start_time = time(NULL);     for(R int i = 1;i <= 3000;i++)         printf(＂1111111111 ＂);     // 1 为转义字符      end_time = time(NULL);      printf(＂1: The different is %6.3f ＂,difftime(end_time,start_time));     // difftime返回的是 结束时间与开始时间相差的秒数     // 注意参数顺序是结束时间,开始时间  } 题目 93
　　题目： 时间函数举例3 #include #include #define R register  // 同样是计算程序运行时间  // clock() : https://www.runoob.com/cprogramming/c-function-clock.html   int main() {     clock_t start_time,end_time;     start_time = clock();     for(R int i = 1;i <= 10000;i++)         printf(＂1111111111 ＂);     end_time = clock();         printf(＂1: The different is %6.3lf ＂,(double)(end_time - start_time) / CLOCKS_PER_SEC); } 题目 94
　　题目： 时间函数举例4(一个猜数游戏，判断一个人的反应快慢)。 #include #include #include #define R register  int x;  int main() {     clock_t start_time,end_time;     srand(time(NULL));     printf(＂now you need to guess this number ＂);     int ans = rand()%100,cnt = 1;     start_time = clock();     scanf(＂%d＂,&x);     while(x != ans)     {         if(x > ans)             printf(＂more smaller please ＂);         if(x < ans)             printf(＂more bigger please ＂);         scanf(＂%d＂,&x);         cnt++;     }     end_time = clock();     printf(＂You only guessed %d times! ＂,cnt);     printf(＂And you used %6.3lf s＂,(double)(end_time - start_time) / CLOCKS_PER_SEC);  } 题目 95
　　题目： 家庭财务管理小程序 /*money management system*/  #include   #include    // 这里的代码是网上流传的未解决的代码 // 代码太抽象了，这里调整了一下排版，由于不清楚具体操作是做什么，又懒得分析，这个代码并没有完善，还是网络上的那个带有bug的代码 // 如果有人想修复这个代码的话，可以喊上我一起(- -自己抽不出大把的时间进行完善分析  int main()  {      FILE *fp;      struct date d;      float sum,chm = 0.0;      int len,i,j=0;      int c;     char ch[4]=＂＂,ch1[16]=＂＂,chtime[12]=＂＂,chshop[16],chmoney[8];      pp: clrscr();      sum = 0.0;      gotoxy(1,1);printf(＂|---------------------------------------------------------------------------|＂);      gotoxy(1,2);printf(＂| money management system(C1.0) 2000.03 |＂);      gotoxy(1,3);printf(＂|---------------------------------------------------------------------------|＂);      gotoxy(1,4);printf(＂| -- money records -- | -- today cost list -- |＂);      gotoxy(1,5);printf(＂| ------------------------ |-------------------------------------|＂);      gotoxy(1,6);printf(＂| date: -------------- | |＂);      gotoxy(1,7);printf(＂| | | | |＂);      gotoxy(1,8);printf(＂| -------------- | |＂);      gotoxy(1,9);printf(＂| thgs: ------------------ | |＂);      gotoxy(1,10);printf(＂| | | | |＂);      gotoxy(1,11);printf(＂| ------------------ | |＂);      gotoxy(1,12);printf(＂| cost: ---------- | |＂);      gotoxy(1,13);printf(＂| | | | |＂);      gotoxy(1,14);printf(＂| ---------- | |＂);      gotoxy(1,15);printf(＂| | |＂);      gotoxy(1,16);printf(＂| | |＂);      gotoxy(1,17);printf(＂| | |＂);      gotoxy(1,18);printf(＂| | |＂);      gotoxy(1,19);printf(＂| | |＂);      gotoxy(1,20);printf(＂| | |＂);      gotoxy(1,21);printf(＂| | |＂);      gotoxy(1,22);printf(＂| | |＂);      gotoxy(1,23);printf(＂|---------------------------------------------------------------------------|＂);      i = 0;      getdate(&d);      sprintf(chtime,＂%4d.%02d.%02d＂,d.da_year,d.da_mon,d.da_day); 52      for(;;)      {          gotoxy(3,24);printf(＂ Tab __browse cost list Esc __quit＂);          gotoxy(13,10);printf(＂ ＂);          gotoxy(13,13);printf(＂ ＂);          gotoxy(13,7);printf(＂%s＂,chtime);          j = 18;          ch[0]=getch();          if(ch[0]==27)              break;          strcpy(chshop,＂＂);          strcpy(chmoney,＂＂);          if(ch[0]==9)          {              mm:i=0;              fp=fopen(＂home.dat＂,＂r+＂);              gotoxy(3,24);printf(＂ ＂);              gotoxy(6,4);printf(＂ list records ＂);              gotoxy(1,5);printf(＂|-------------------------------------|＂);              gotoxy(41,4);printf(＂ ＂);              gotoxy(41,5);printf(＂ |＂);              while(fscanf(fp,＂%10s%14s%f ＂,chtime,chshop,&chm)!=EOF) {                  if(i==36)                  {                     getch();                      i = 0;                 }                  if ( (i % 36) < 17)                  {                     gotoxy(4,6+i);                      printf(＂ ＂);                      gotoxy(4,6+i);                 }                  else if( (i % 36) >16)                  {                      gotoxy(41,4+i-17);                      printf(＂ ＂);                      gotoxy(42,4+i-17);                 }                  i++;                  sum = sum + chm;                  printf(＂%10s %-14s %6.1f ＂,chtime,chshop,chm);             }              gotoxy(1,23);printf(＂|---------------------------------------------------------------------------|＂);              gotoxy(1,24);printf(＂| |＂);              gotoxy(1,25);printf(＂|---------------------------------------------------------------------------|＂);              gotoxy(10,24);printf(＂total is %8.1f#34;,sum);              fclose(fp);              gotoxy(49,24);printf(＂press any key to.....＂);getch();goto pp;          }          else             {              while(ch[0] != ＂r＂) {                     if(j < 10) {                         strncat(chtime,ch,1);                          j++;                     }                  if(ch[0] == 8)                  {                      len=strlen(chtime)-1;                      if(j > 15){                         len = len+1;                          j = 11;                     }                      strcpy(ch1,＂＂);                      j = j - 2;                      strncat(ch1,chtime,len);                      strcpy(chtime,＂＂);                      strncat(chtime,ch1,len-1);                     gotoxy(13,7);printf(＂ ＂);                 }                 gotoxy(13,7);printf(＂%s＂,chtime);ch[0]=getch();                  if(ch[0]==9)                      goto mm;                  if(ch[0]==27)                      exit(1);              }              gotoxy(3,24);printf(＂ ＂);              gotoxy(13,10);              j = 0;              ch[0]=getch();              while(ch[0] != ＂r＂)              {                 if (j < 14)                  {                     strncat(chshop,ch,1);                      j++;                 }                  if(ch[0] == 8)                  {                      len=strlen(chshop)-1;                      strcpy(ch1,＂＂);                      j = j-2;                      strncat(ch1,chshop,len);                      strcpy(chshop,＂＂);                      strncat(chshop,ch1,len-1);                      gotoxy(13,10);printf(＂ ＂);                 }                  gotoxy(13,10);printf(＂%s＂,chshop);                 ch[0]=getch();             }              gotoxy(13,13);              j = 0;              ch[0]=getch();              while(ch[0] != ＂r＂){                 if (j<6) {                     strncat(chmoney,ch,1);                      j++;                 }                  if(ch[0]==8) {                     len=strlen(chmoney)-1;                      strcpy(ch1,＂＂);                      j=j-2;                      strncat(ch1,chmoney,len);                      strcpy(chmoney,＂＂);                      strncat(chmoney,ch1,len-1);                      gotoxy(13,13);printf(＂ ＂);}                      gotoxy(13,13);printf(＂%s＂,chmoney);                     ch[0]=getch();             }              if((strlen(chshop)==0)||(strlen(chmoney)==0))                  continue;              // 这下面的if不知道应该配上哪一个，未作改动              if((fp=fopen(＂home.dat＂,＂a+＂))!=NULL);                 fprintf(fp,＂%10s%14s%6s＂,chtime,chshop,chmoney);                  fputc(＂ ＂,fp);                  fclose(fp);                  i++;                  gotoxy(41,5+i);              printf(＂%10s %-14s %-6s＂,chtime,chshop,chmoney);          }     } }