经典C程序100例==91--100

【程序91】

题目：时间函数举例1

1.程序分析：

2.程序源代码：

#include "stdio.h"

#include "time.h"

void main()

{ time_t lt; /*define a longint time varible*/

lt=time(NULL);/*system time and date*/

printf(ctime(<)); /*english format output*/

printf(asctime(localtime(<)));/*tranfer to tm*/

printf(asctime(gmtime(<))); /*tranfer to Greenwich time*/

}

==============================================================

【程序92】

题目：时间函数举例2

1.程序分析：　　　

2.程序源代码：

/*calculate time*/

#include "time.h"

#include "stdio.h"

main()

{ time_t start,end;

int i;

start=time(NULL);

for(i=0;i<3000;i++)

{ printf("1111111111

");}

end=time(NULL);

printf("1: The different is %6.3f

",difftime(end,start));

}

==============================================================

【程序93】

题目：时间函数举例3

1.程序分析：

2.程序源代码：

/*calculate time*/

#include "time.h"

#include "stdio.h"

main()

{ clock_t start,end;

int i;

double var;

start=clock();

for(i=0;i<10000;i++)

{ printf("1111111111

");}

end=clock();

printf("1: The different is %6.3f

",(double)(end-start));

}

==============================================================

【程序94】

题目：时间函数举例4,一个猜数游戏，判定一个人反应快慢。（版主初学时编的）

1.程序分析：

2.程序源代码：

#include "time.h"

#include "stdlib.h"

#include "stdio.h"

main()

{char c;

clock_t start,end;

time_t a,b;

double var;

int i,guess;

srand(time(NULL));

printf("do you want to play it.('y' or 'n')

");

loop:

while((c=getchar())=='y')

{

i=rand()%100;

printf("

please input number you guess:

");

start=clock();

a=time(NULL);

scanf("%d",&guess);

while(guess!=i)

{if(guess>i)

{printf("please input a little smaller.

");

scanf("%d",&guess);}

else

{printf("please input a little bigger.

");

scanf("%d",&guess);}

}

end=clock();

b=time(NULL);

printf("1: It took you %6.3f seconds

",var=(double)(end-start)/18.2);

printf("1: it took you %6.3f seconds

",difftime(b,a));

if(var<15)

printf("11 You are very clever! 11

");

else if(var<25)

printf("11 you are normal! 11

");

else

printf("11 you are stupid! 11

");

printf("11 Congradulations 11

");

printf("The number you guess is %d",i);

}

printf("

do you want to try it again?("yy".or."n")

");

if((c=getch())=='y')

goto loop;

}

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【程序95】

题目：家庭财务治理小程序

1.程序分析：

2.程序源代码：

/*money management system*/

#include "stdio.h"

#include "dos.h"

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);

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$",sum);

fclose(fp);

gotoxy(49,24);printf("press any key to.....");getch();goto pp;

}

else

{

while(ch[0]!='

')

{ 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]!='

')

{ 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