C语言必会100题(19)。时间函数举例1/时间函数举例2/时间函数举例3/时间函数举例4/家庭财务管理小程序

wuchangjian2021-11-15 06:51:34编程学习

特此鸣谢:鱼C_小甲鱼(B站up主)不二如是(鱼C论坛大佬)
题目来源:https://fishc.com.cn
注:这些题在网上都可以搜到,题下面的代码大多是流传下来的答案(我重新排了一下版,增加了可读性),部分是本人经过深思熟虑后编写的。

91,时间函数举例1

1.题目:无
2.程序源代码:

#include <stdio.h>
#include <time.h>

int main()
{
    // time_t就是long int型
    time_t lt;
    // 获取系统当前时间
    lt=time(NULL);

    // ctime函数,将日期和时间转换为字符串
    printf(ctime(&lt)); 
    
    // localtime是 把从1970-1-1零点零分到当前时间系统所偏移的秒数时间转换为本地时间,返回指针
    // asctime函数把储存的时间转换为字符串
    printf(asctime(localtime(&lt)));
    // gmtime函数转换后的时间没有经过时区变换,是UTC时间 
    printf(asctime(gmtime(&lt))); 
    
    return 0;
}

92,时间函数举例2

1.题目:无
2.程序源代码:

#include <stdio.h>
#include <time.h>

int main()
{
    time_t start, end;
    int i;

    start = time(NULL);
    for(i = 0; i < 3000; i++) {

        printf("\1\1\1\1\1\1\1\1\1\1\n");
    }
    end = time(NULL);

    // 返回 time1 和 time2 之间相差的秒数 (time1 - time2)
    printf("The different is %6.3f\n", difftime(end, start));

    return 0;
}

93,时间函数举例3

1.题目:无
2.程序源代码:

#include <stdio.h>
#include <time.h>

int main()
{
    clock_t start, end;

    // 该程序从启动到函数调用占用CPU的时间
    start = clock();
    for(i = 0; i < 10000; i++) {
        printf("\1\1\1\1\1\1\1\1\1\1\n");
    }
    end = clock();
    printf(": The different is %6.3f\n", (double)(end-start));

    return 0;
}

94,时间函数举例4

1.题目:用之前的时间函数做一个猜数游戏,判断一个人反应快慢,要求评价用户的速度。
2.程序源代码:

#include <time.h>
#include <stdlib.h>
#include <stdio.h>

int main()
{
    char c;
    clock_t start, end;
    time_t a, b;
    double var;
    int i, guess;

    // 随机生成一个种子数字,之前的C语言程序用过
    // 生成种子数字后,rand函数使用。
    srand(time(NULL));
    printf("do you want to play it(是否想要玩这个游戏?).('y' or 'n') \n");

    loop:
        while((c = getchar()) == 'y') {

            // 将获取到的数字取100余数,确保数字在1到100;
            i = rand() % 100;
            printf("\nplease input number you guess(输入你猜的数字):\n");

            // 该程序从启动到函数调用占用CPU的时间
            start = clock();
            // 获取系统当前时间
            a = time(NULL);
            scanf("%d", &guess);

            while(guess != i) {

                if(guess > i) {
                    printf("please input a little smaller(请输入一个较小的数字).\n");
                    scanf("%d", &guess);
                } else {
                    printf("please input a little bigger(请输入一个较大的数字).\n");
                    scanf("%d", &guess);
                }
            }

            end = clock();
            b = time(NULL);

            printf(": It took you %6.3f seconds\n", var = (double)(end - start) / 18.2);
            printf(": it took you %6.3f seconds\n\n", difftime(b, a));

            if (var < 15) {

                printf("You are very clever!\n\n");
            } else if (var<25) {

                printf("you are normal!\n\n");
            } else {

                printf("you are stupid!\n\n");
            }
            printf("Congradulations\n\n");
            printf("The number you guess is %d", i);

        }

        printf("\ndo you want to try it again?(\"yy\".or.\"n\")\n");

        // 这里用户必须输入两个y,因为输入两个y的时候程序才知道你输入了1个y;可以看一下putchar(c);
        if((c = getchar()) == 'y') {

            putchar(c);
            goto loop;

        }

        return 0;
}

95,家庭财务管理小程序

1.题目:创建一个家庭财务管理小程序
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); 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\n",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\n",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 
{ 53 
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) 54 
{ 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; 
if((fp=fopen("home.dat","a+"))!=NULL); 
fprintf(fp,"%10s%14s%6s",chtime,chshop,chmoney); 
fputc('\n',fp); 
fclose(fp); 
i++; 
gotoxy(41,5+i); 
printf("%10s %-14s %-6s",chtime,chshop,chmoney); 
}}}

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