小学生学习四则运算辅助系统
作者:互联网
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <time.h> int randomNumber() //生成一个随机数 { int a = rand() % 10+1; return a; } int printfNumber() //打印数字并读取用户输入,正确返回1,错误返回0 { int num_1, num_2,userInput; num_1 = randomNumber(); num_2 = randomNumber(); char a; int i; i = rand() % 4; switch (i) //随机产生一个运算符 { case 0: a = '+'; break; case 1: a = '-'; break; case 2: a = '*'; break; case 3: a = '/'; break; default: printf("error"); break; } printf("%d %c %d = ", num_1,a, num_2); scanf("%d", &userInput); float calculateResult; switch (a) //计算正确结果 { case '+': calculateResult = num_1 + num_2; break; case '-': calculateResult = num_1 - num_2; break; case '*': calculateResult = num_1 * num_2; break; case '/': calculateResult = num_1 / num_2; break; } if (calculateResult == userInput) return 1; if (calculateResult != userInput) return 0; } void randomRight() //随机产生一个正确提示语 { int i = rand() % 4; switch (i) { case 0:printf("Very good!\n"); break; case 1:printf("Excellent!\n"); break; case 2:printf("Nice work!\n"); break; case 3:printf("Keep up the good work!\n"); break; default:printf("error\n"); break; } } void randomWrong() //随机产生一个错误提示语 { int i = rand() % 4; switch (i) { 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; case 3:printf("Not correct.Keep trying.\n"); break; default:printf("error\n"); break; } } int main() { printf("*****************************************************************\n"); printf("** 小学生学习四则运算辅助系统 **\n"); printf("** 按下1进入有重做机会的测试 按下2进入无重做机会的测试 **\n"); printf("*****************************************************************\n"); int a = getchar(); srand(time(0)); if (a == '1') //进入可以重做三次的测试 { int i, j = 0, k = 0, m; //i用于控制十次答题,j计算正确的次数,k计算错误的次数 for (i = 0; i < 10; i++) { m = printfNumber(); if (m==1) { j++; k = 0; randomRight(); } if (m==0) { k++; if (k < 3) { randomWrong(); } if (k == 3) //错误三次 结束 { printf("Wrong!You have tried 3 times, test over.\n"); break; } } } } if (a == '2') //进入无重做机会的测试 { int i, j = 0, k = 0, m, flag = 0; //i用于控制十次答题,j计算正确的次数,k计算错误的次数 //flag为0时正确率小于75,为1时大于75 do { for (i = 0; i < 10; i++) { m = printfNumber(); if (m == 1) { j++; randomRight(); } if (m == 0) { k++; randomWrong(); } } printf("Your score is %d,accuracy is %d%%.\n", 10 * j, 10 * j); flag = 1; if (10 * j < 75) { printf("Again!\n"); flag = 0; } } while (flag == 0); } return 0; }
除法会出现一些问题,暂时不知道怎么改
标签:case,calculateResult,辅助,int,四则运算,break,num,printf,小学生 来源: https://www.cnblogs.com/steelbeng/p/14765688.html