第一题
题目分析:程序判断一个数的位数可以通过循环除以10求余,通过盘算第一次与10求余为0的次数盘算位数,由此可得示例1代码,另一种思路根据提示,可得示例2代码。
代码示例1:
- #include<stdio.h>
- int main()
- {
- printf("Enter a number: ");
- int number,temp;
- scanf_s("%d", &number);
- temp = number;
- int digit = 0;
- while (temp % 10 != 0)
- {
- digit += 1;
- temp = temp / 10;
- };
- printf("The number %d has %d digits", number, digit);
- return 0;
- }
复制代码 输出:
代码示例2:
- #include<stdio.h>
- int main()
- {
- /*printf("Enter a number: ");
- int number,temp;
- scanf_s("%d", &number);
- temp = number;
- int digit = 0;
- while (temp % 10 != 0)
- {
- digit += 1;
- temp = temp / 10;
- };
- printf("The number %d has %d digits", number, digit);
- return 0;*/
- int number;
- printf("Enter a number: ");
- scanf_s("%d", &number);
- if (number >= 0 && number <= 9)
- {
- printf("The number %d has 1 digits", number);
- }
- else if (number >= 10 && number <= 99)
- {
- printf("The number %d has 2 digits", number);
- }
- else if (number >= 100 && number <= 999)
- {
- printf("The number %d has 3 digits", number);
- }
- else if (number >= 1000 && number <= 9999)
- {
- printf("The number %d has 4 digits", number);
- }
- else
- {
- printf("The number %d 输入位数多于4位", number);
- }
- return 0;
- }
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第二题
题目分析:输入24进制小时制的时间,显示12小时的格式如果大于12时,减去12即可,如果小于12,原样显示,由此给出如下代码。
示例代码
- #include<stdio.h>
- int main()
- {
- printf("Enter a 24-hour time: ");
- int h, m;
- scanf_s("%d:%d", &h, &m);
- if (h>24)
- {
- printf("输入数据%d:%d不符合要求", h, m);
- }
- else if (h>12&&h<24)
- {
- printf("Equivalent 12-hour time: %d:%d PM", h - 12, m);
- }
- else if (h<0)
- {
- printf("输入数据%d:%d不符合要求", h, m);
- }
- else if (h==24)
- {
- printf("Equivalent 12-hour time: %d:%d AM", h - 24, m);
- }
- else
- {
- printf("Equivalent 12-hour time: %d:%d AM", h, m);
- }
- return 0;
- }
复制代码 输出
第三题
题目分析:这个题我的理解是基础33美元,然后每股加3美分或者2美分,将美分换算成美元进行盘算,得到下列代码。
示例代码
- #include<stdio.h>
- int main()
- {
- float commission, value, per_price;
- int num;
- printf("Enter value of trade: ");
- scanf_s("%f%d", &per_price, &num);
- value = per_price * num;
- if (value<2500.00f)
- {
- commission = 30.00f + .017f * value;
- }
- else if (value<6250.00f)
- {
- commission = 56.00f + .0066f * value;
- }
- else if (value<20000.00f)
- {
- commission = 76.00f + .0034f * value;
- }
- else if (value<50000.00f)
- {
- commission = 100.00f + .0022f * value;
- }
- else if (value<500000.00f)
- {
- commission = 155.00f + .0011f * value;
- }
- else
- {
- commission = 255.00f + .0009f * value;
- }
- if (commission<39.00f)
- {
- commission = 39.00f;
- }
- printf("Commission: $%.2f\n", commission);
- //竞争对手
- float j_money;
- if (num < 20000)
- {
- j_money = 33.00f + 3.00f*num/100.00f;
- }
- else
- {
- j_money = 33.00f + 2.00f*num/100.00f;
- }
- printf("j_money: $%.2f\n", j_money);
- return 0;
- }
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第四题
题目分析:简朴的数值范围判断题目
示例代码
- #include<stdio.h>
- int main()
- {
- float wind_speed;
- printf("Eter the wind speed: ");
- scanf_s("%f", &wind_speed);
- if (wind_speed<1)
- {
- printf("Calm(无风)");
- }
- else if (wind_speed>=1&&wind_speed<=3)
- {
- printf("Light air(轻风)");
- }
- else if (wind_speed>=4&&wind_speed<=27)
- {
- printf("Breeze(微风)");
- }
- else if (wind_speed>=28&&wind_speed<=47)
- {
- printf("Gale(大风)");
- }
- else if (wind_speed>=48&&wind_speed<=63)
- {
- printf("Strom(暴风)");
- }
- else if (wind_speed > 63)
- {
- printf("Hurricane(飓风)");
- }
- return 0;
- }
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第五题
题目分析:这个题紧张是注意有印刷错误。
示例代码
- #include<stdio.h>
- int main()
- {
- printf("输入收入:");
- float salary, tax;
- scanf_s("%f", &salary);
- if (salary<=750)
- {
- tax = salary * .01;
- }
- else if (salary<=2250)
- {
- tax = 7.5 + (salary - 750) * .02;
- }
- else if (salary<=3750)
- {
- tax = 37.5 + (salary - 2250) * .03;
- }
- else if (salary<=5250)
- {
- tax = 82.50 + (salary - 3750) * .04;
- }
- else if (salary<=7000)
- {
- tax = 142.50 + (salary - 5250) * .05;
- }
- else
- {
- tax = 230.00 + (salary - 7000) * .06;
- }
- printf("应该交税$%.2f", tax);
- return 0;
- }
复制代码 输出
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