C程序设计

#C程序设计| 来源: 网络整理| 查看: 265

(ps: 学校上学期c语言实验的一个报告，难度上确实不大，但最近整理代码时看到了之前写的，所以就记录下来)

题目要求：

任务 1：随机产生 1 - 10 之间正整数，出乘法问题，直到学生答对为止。任务 2：在任务 1 基础上，当学生答错时，最多给三次机会。任务 3：在任务 1 基础上，连做 10 道乘法题，不给机会重做，统计总分、正确率。任务 4：在任务 3 基础上，随机产生 10 道四则运算题，不给机会重做，统计总分、正确率。任务 5：在任务 4 基础上，若回答正确率低于 75 % ，则再做 10 道题，直到正确率高于 75 % 为止。任务 6：在任务 5 基础上，随机生成1~4间随机数，来为学生输入的每一个正确或错误的答案输出不同评价。

代码实现

目录题目要求：代码实现main函数 / 菜单部分功能判断两个数是否相同产生随机数函数返回分数 / 计算正答率任务任务一任务二任务三任务四任务五任务六完整代码

完整代码跳转↑

main函数 / 菜单 void menu() { printf("******************************************************************************\n"); printf("小学生计算机辅助系统\n"); printf(" * 1. 任务 1：随机产生 1 - 10 之间正整数，出乘法问题，直到学生答对为止。\n"); printf(" * 2. 任务 2：在任务 1 基础上，当学生答错时，最多给三次机会。 \n"); printf(" * 3. 任务 3：在任务 1 基础上，连做 10 道乘法题，不给机会重做，统计总分、正确率。\n"); printf(" * 4. 任务 4：在任务 3 基础上，随机产生 10 道四则运算题，不给机会重做，统计总分、正确率。 \n"); printf(" * 5. 任务 5：在任务 4 基础上，若回答正确率低于 75 % ，则再做 10 道题，直到正确率高于 75 % 为止。\n"); printf(" * 6. 任务 6：在任务 5 基础上，随机生成1~4间随机数，来为学生输入的每一个正确或错误的答案输出不同评价。 \n"); printf(" * 0. 退出程序\n"); printf("***************************************************************************** \n"); printf("请输入任务选项:"); } int main() { int input, flag = 0; menu(); while (~scanf("%d", &input)) { switch (input) { case 1: taskOne(); break; case 2: taskTwo(); break; case 3: taskThree(); break; case 4: taskFour(); break; case 5: taskFive(); break; case 6: taskSix(); break; case 0: printf("程序退出\n"); flag = 1; break; default: printf("命令错误，程序已结束\n"); break; } if (flag == 1) break; else printf("请输入任务选项:"); } return 0; } 部分功能判断两个数是否相同 int Pending(int a, int b) { if (a == b) { printf("Right!\n"); rightCount++; } else { printf("Wrong!\n"); } return 0; } 产生随机数函数 int Srand1()//产生1~10 { srand((unsigned int)time(NULL)); int i; i = rand() % 10 + 1; return i; } int Srand2()//产生1~10 { int i; i = rand() % 10 + 1; return i; } 返回分数 / 计算正答率 //传入算对的题数，返回分数 int StatisticScore(int num) { int score; score = num * 10; return score; } //计算答题正确率 double StatisticRate(double num) { double rate; rate = num / 10; return rate; } 任务任务一

由于任务1要求可以重试，所以错误时提示词不一样（要求…）这里不用一开始实现的Pending()，额外写一个

随机产生 1 - 10 之间正整数，出乘法问题，直到学生答对为止。

//任务一 //计算两个数是否相同 int PendingOne(int a, int b) { if (a == b) { printf("Right!\n"); rightCount++; } else { printf("Wrong! Please try again\n"); } return 0; } void taskOne() { int a, b, sum, input; do { a = Srand1(); b = Srand2(); sum = a * b; printf("%d * %d = ", a, b); scanf("%d", &input); PendingOne(sum, input); } while (input != sum); printf("任务结束\n"); } 任务二

在任务 1 基础上，当学生答错时，最多给三次机会。

void taskTwo() { srand((unsigned)time(NULL)); int flag, count; flag = 0; count = 0; double a, b, sum, input; int c;//用于四则运算switch语句 do { a = Srand1(); b = Srand2(); c = rand() % 4;//c用作随机生成四则运算的标志 switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: sum = a + b; printf("%.2f+%.2f = ", a, b); break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); if (sum == input) { flag++; printf("Right\n"); } else { count++; //最多尝试3次 if (count != 3) printf("Wrong! Please try again.\n"); else { printf("Wrong! You have tried three times! Test over!\n"); break; } } } while (flag != 1); flag = count = 0; } 任务三

在任务 1 基础上，连做 10 道乘法题，不给机会重做，统计总分、正确率。

void taskThree() { int a, b, sum, input, flag = 0; rightCount = 0;//回答正确个数 do { flag++; a = Srand1(); b = Srand2(); sum = a * b; printf("%d * %d = ", a, b); scanf("%d", &input); Pending(sum, input); } while (flag != 10); int score = StatisticScore(rightCount);//计算总分 double rate = StatisticRate(rightCount);//计算正答率 printf("得分: %d , 正确率:%.2f\n", score, rate); } 任务四

在任务 3 基础上，随机产生 10 道四则运算题，不给机会重做，统计总分、正确率。

void taskFour() { int c, parameter, sum, flag = 0; double a, b; int score;//分数 rightCount = 0;//正答题数 double input, rate; do { flag++; a = Srand1(); b = Srand2(); c = rand() % 4; switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: sum = a + c; printf("%.2f+%.2f = ", a, b); break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); Pending(sum, input); } while (flag != 10); //计算并输出分数和正确率 score = StatisticScore(rightCount); rate = StatisticRate(rightCount); printf("得分为: %d ,正确率为: %.2f \n", score, rate); } 任务五

在任务 4 基础上，若回答正确率低于 75 % ，则再做 10 道题，直到正确率高于 75 % 为止。

void taskFive() { int c, flag; double a, b, sum, input; rightCount = 0; double rate = 0; do { flag = 0; do { a = Srand1(); //a = (double)a; b = Srand2(); //b = (double)b; c = rand() % 4; switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: sum = a + b; printf("%.2f+%.2f = ", a, b); break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); flag++; Pending(sum, input); } while (flag != 10); int score = StatisticScore(rightCount); // score = 1.0 * rightCount; rate = StatisticRate(rightCount); printf("分数：%d 正确率：%.2f \n\n", score, rate); } while (rate flag = 0; do { a = Srand1(); b = Srand2(); c = rand() % 4; switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: printf("%.2f+%.2f = ", a, b); sum = a + b; break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); flag++; PendingSix(sum, input); } while (flag != 10); int score = StatisticScore(rightCount); // score = 1.0 * rightCount; rate = StatisticRate(rightCount); printf("分数：%d 正确率：%.2f \n\n", score, rate); } while (rate if (a == b) { printf("Right!\n"); rightCount++; } else { printf("Wrong!\n"); } return 0; } //产生随机数函数 int Srand1()//产生1~10 { srand((unsigned int)time(NULL)); int i; i = rand() % 10 + 1; return i; } int Srand2()//产生1~10 { int i; i = rand() % 10 + 1; return i; } //传入算对的题数，返回分数 int StatisticScore(int num) { int score; score = num * 10; return score; } //计算答题正确率 double StatisticRate(double num) { double rate; rate = num / 10; return rate; } //任务一 int PendingOne(int a, int b) { if (a == b) { printf("Right!\n"); rightCount++; } else { printf("Wrong! Please try again\n"); } return 0; } //任务一 void taskOne() { int a, b, sum, input; do { a = Srand1(); b = Srand2(); sum = a * b; printf("%d * %d = ", a, b); scanf("%d", &input); PendingOne(sum, input); } while (input != sum); printf("任务结束\n"); } //任务二 void taskTwo() { srand((unsigned)time(NULL)); int flag, count; flag = 0; count = 0; double a, b, sum, input; int c;//用于四则运算switch语句 do { a = Srand1(); b = Srand2(); c = rand() % 4;//c用作随机生成四则运算的标志 switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: sum = a + b; printf("%.2f+%.2f = ", a, b); break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); if (sum == input) { flag++; printf("Right\n"); } else { count++; //最多尝试3次 if (count != 3) printf("Wrong! Please try again.\n"); else { printf("Wrong! You have tried three times! Test over!\n"); break; } } } while (flag != 1); flag = count = 0; } //任务三 void taskThree() { int a, b, sum, input, flag = 0; rightCount = 0;//回答正确个数 do { flag++; a = Srand1(); b = Srand2(); sum = a * b; printf("%d * %d = ", a, b); scanf("%d", &input); Pending(sum, input); } while (flag != 10); int score = StatisticScore(rightCount);//计算总分 double rate = StatisticRate(rightCount);//计算正答率 printf("得分: %d , 正确率:%.2f\n", score, rate); } //任务四 void taskFour() { int c, parameter, sum, flag = 0; double a, b; int score;//分数 rightCount = 0;//正答题数 double input, rate; do { flag++; a = Srand1(); b = Srand2(); c = rand() % 4; switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: sum = a + c; printf("%.2f+%.2f = ", a, b); break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); Pending(sum, input); } while (flag != 10); //计算并输出分数和正确率 score = StatisticScore(rightCount); rate = StatisticRate(rightCount); printf("得分为: %d ,正确率为: %.2f \n", score, rate); } //任务五 void taskFive() { int c, flag; double a, b, sum, input; rightCount = 0; double rate = 0; do { flag = 0; do { a = Srand1(); //a = (double)a; b = Srand2(); //b = (double)b; c = rand() % 4; switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: sum = a + b; printf("%.2f+%.2f = ", a, b); break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); flag++; Pending(sum, input); } while (flag != 10); int score = StatisticScore(rightCount); // score = 1.0 * rightCount; rate = StatisticRate(rightCount); printf("分数：%d 正确率：%.2f \n\n", score, rate); } while (rate switch (c) { case 0: printf("Very good!\n"); break; case 1: printf("Excellent!\n"); break; case 2: printf("Nice work!\n"); break; default: printf("Keep up the good work!\n"); break; } rightCount++; } else { switch (c) { case 0: printf("No. Please try again.\n"); break; case 1: printf("Wrong. Try once more.\n"); break; case 2: printf("Don't give up.\n"); break; default: printf("Not correct. Keep trying\n"); break; } } return 0; } //任务六 void taskSix() { int c, flag; double a, b, sum, input; rightCount = 0; double rate = 0; do { flag = 0; do { a = Srand1(); b = Srand2(); c = rand() % 4; switch (c) { case 0: printf("%.2f/%.2f = ", a, b); sum = a / b; break; case 1: printf("%.2f*%.2f = ", a, b); sum = a * b; break; case 2: printf("%.2f+%.2f = ", a, b); sum = a + b; break; default: printf("%.2f-%.2f = ", a, b); sum = a - b; } scanf("%lf", &input); flag++; PendingSix(sum, input); } while (flag != 10); int score = StatisticScore(rightCount); // score = 1.0 * rightCount; rate = StatisticRate(rightCount); printf("分数：%d 正确率：%.2f \n\n", score, rate); } while (rate switch (input) { case 1: taskOne(); break; case 2: taskTwo(); break; case 3: taskThree(); break; case 4: taskFour(); break; case 5: taskFive(); break; case 6: taskSix(); break; case 0: printf("程序退出\n"); flag = 1; break; default: printf("命令错误，程序已结束\n"); break; } if (flag == 1) break; else printf("请输入任务选项:"); } return 0; }

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C程序设计

C程序设计

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