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软件工程第四次作业
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软件工程第四次作业
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#include<stdio.h>
#include<iostream>
#include <stdlib.h>
#include <time.h>
using namespace std;
typedef struct {
float figure[4];
char symbol[3];
int bracket[2];//括号
}equation;
int questionnumber;//问题数量
char operateCharacter[4]; //运算符数组
int operatenum = 0;//运算符数量
int isbracket;//括号
int isdecimal;//小数
int maxnumber;//最大数
int printway;//输出方式
equation expression[100];
int random(int y)//随机数函数
{
int n;
n = rand() % (y + 1);
return n;
}
void screen()
{
printf("请设置题目个数:\n");
scanf("%d%c", &questionnumber);
printf("请选择运算符: + - * / \n");
for (int i = 0;; i++)
{
char c;
scanf("%c", &c);
if (c == '\n') break;
else {
operateCharacter[i] = c;
operatenum++;
}
}
printf("请输入最大数:\n");
scanf_s("%d", &maxnumber);
printf("是否有括号: 0无括号 1有括号 \n");
scanf_s("%d", &isbracket);
printf("是否有小数: 0无小数 1有小数 \n");
scanf_s("%d", &isdecimal);
printf("输出方式: 0文件 1屏幕 \n");
scanf_s("%d", &printway);
}
void arithmetic()
{
int i = 0;
int k = 0;
int m = questionnumber;
while (m-- > 0)
{
if (isdecimal == 0)
{
while (k <= 4)
{
expression[i].figure[k] = random(maxnumber);
k++;
}
}
else
{
while (k <= 4)
{
float a = float(random(maxnumber * 100));
expression[i].figure[k] = a / 100;
k++;
}
}
for (int j = 0; j < 3; j++)
{
expression[i].symbol[j] = operateCharacter[random(operatenum - 1)];
}
expression[i].bracket[0] = random(2);
if (expression[i].bracket[0] == 0) expression[i].bracket[1] = 1 + random(1);
if (expression[i].bracket[0] == 1) expression[i].bracket[1] = 2 + random(1);
if (expression[i].bracket[0] == 2) expression[i].bracket[1] = 3;
i++;
k = 0;
}
}
void show1()
{
if (isdecimal == 0) {
if (isbracket == 0)
{
for (int i = 0; i < questionnumber; i++)
{
for (int j = 0; j < 3; j++)
{
printf("%.0f", expression[i].figure[j]);
printf("%c", expression[i].symbol[j]);
}
printf("%.0f=\n", expression[i].figure[3]);
}
}
else
{
for (int i = 0; i < questionnumber; i++)
{
int j;
for (j = 0; j < 3; j++)
{
if (j == expression[i].bracket[0]) printf("(");
printf("%.0f", expression[i].figure[j]);
if (j == expression[i].bracket[1]) printf(")");
printf("%c", expression[i].symbol[j]);
}
printf("%.0f", expression[i].figure[3]);
if (j == expression[i].bracket[1]) printf(")");
printf("=\n");
}
}
}
else {
if (isbracket == 0)
{
for (int i = 0; i < questionnumber; i++)
{
for (int j = 0; j < 3; j++)
{
printf("%.2f", expression[i].figure[j]);
printf("%c", expression[i].symbol[j]);
}
printf("%.2f=\n", expression[i].figure[3]);
}
}
else
{
for (int i = 0; i < questionnumber; i++)
{
int j;
for (j = 0; j < 3; j++)
{
if (j == expression[i].bracket[0]) printf("(");
printf("%.2f", expression[i].figure[j]);
if (j == expression[i].bracket[1]) printf(")");
printf("%c", expression[i].symbol[j]);
}
printf("%.2f", expression[i].figure[3]);
if (j == expression[i].bracket[1]) printf(")");
printf("=\n");
}
}
}
}
void show0()
{
FILE* fp;
fp = fopen("2.txt", "w");
if (isdecimal == 0) {
if (isbracket == 0)
{
for (int i = 0; i < questionnumber; i++)
{
for (int j = 0; j < 3; j++)
{
fprintf(fp, "%.0f", expression[i].figure[j]);
fprintf(fp, "%c", expression[i].symbol[j]);
}
fprintf(fp, "%.0f=\n", expression[i].figure[3]);
}
}
else
{
for (int i = 0; i < questionnumber; i++)
{
int j;
for (j = 0; j < 3; j++)
{
if (j == expression[i].bracket[0]) fprintf(fp, "(");
fprintf(fp, "%.0f", expression[i].figure[j]);
if (j == expression[i].bracket[1]) fprintf(fp, ")");
fprintf(fp, "%c", expression[i].symbol[j]);
}
fprintf(fp, "%.0f", expression[i].figure[3]);
if (j == expression[i].bracket[1]) fprintf(fp, ")");
fprintf(fp, "=\n");
}
}
}
else {
if (isbracket == 0)
{
for (int i = 0; i < questionnumber; i++)
{
for (int j = 0; j < 3; j++)
{
fprintf(fp, "%.2f", expression[i].figure[j]);
fprintf(fp, "%c", expression[i].symbol[j]);
}
fprintf(fp, "%.2f=\n", expression[i].figure[3]);
}
}
else
{
for (int i = 0; i < questionnumber; i++)
{
int j;
for (j = 0; j < 3; j++)
{
if (j == expression[i].bracket[0]) fprintf(fp, "(");
fprintf(fp, "%.2f", expression[i].figure[j]);
if (j == expression[i].bracket[1]) fprintf(fp, ")");
fprintf(fp, "%c", expression[i].symbol[j]);
}
fprintf(fp, "%.2f", expression[i].figure[3]);
if (j == expression[i].bracket[1]) fprintf(fp, ")");
fprintf(fp, "=\n");
}
}
}
}
int main()
{
srand(time(NULL));
screen();
arithmetic();
if (printway == 1)
show1();
else
show0();
}