软件工程基础实验二源代码

标签：num1 num2 num3 int else 软件工程 实验 printf 源代码

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

void Menu();
int getChoice();
void doExercise(int ch);

void integer(int choice);
void decimals(int choice);
void mixInteger();
void mixDecimals();
void integerAnswer(int y[]);
void decimalsAnswer(double y[]);

int subject = 0; //题目数量
int max = 0; //最大范围
int decimal = 0; //小数运算
int bracket = 0; //混合运算
int file = 0; //输出方式
FILE *r;

int main()
{
int choice = 0;
int again = 0;
Menu();
choice = getChoice();
printf("请输入题目数量：");
scanf("%d",&subject);
printf("请输入运算数范围：");
scanf("%d",&max);
printf("请输入 1/0 代表 是/否有小数：");
scanf("%d",&decimal);
if(choice == 5){
printf("请输入 1/0 代表 是/否有括号：");
scanf("%d",&bracket);
}
printf("请输入 1/0 代表 输出文件/显示在屏幕 ：");
scanf("%d", &file);
if (file == 1)
{
printf("\n生成 四则运算.txt文件");
}
r = fopen("四则运算.txt", "w");

printf("\n\n");
if (choice != 5)
{
if (decimal == 0) {
integer(choice);
}
else {
decimals(choice);
}
}
else {
if (decimal == 0) {
mixInteger();
}
else {
mixDecimals();
}
}
fclose(r);
printf("\n请输入1/0选择是否重新运行运行该程序？\n");
scanf("%d", &again);
if (again == 1)
{
system("cls");
main();
}

return 0;

}

void Menu()
{

printf("-----------------------------------------\n");
printf(" 欢迎使用小学生四则运算练习题 \n");
printf(" 1.加法练习 \n");
printf(" 2.减法练习 \n");
printf(" 3.乘法练习 \n");
printf(" 4.除法练习 \n");
printf(" 5.混合练习 \n");
printf(" 注意：小数练习结果请保留两位小数 \n");
printf("-----------------------------------------\n");

}

int getChoice()
{
int choice;
printf("请输入你练习的题型：");
scanf("%d",&choice);
return choice;
}

void integer(int choice)
{
int i;
int num1;
int num2;
int x[100];
char ch;
for (i = 1; i < subject + 1; i++)
{
srand((unsigned int)time(NULL));
num1 = rand() % (max + 1);
num2 = rand() % (max + 1);
while (num2 == 0) {
num2 = rand() % (max + 1);
}

if (choice == 1) {
ch = '+';
x[i] = num1 + num2;
}
else if (choice == 2)
{
ch = '-';
x[i] = num1 - num2;
}
else if (choice == 3) {
ch = '*';
x[i] = num1 * num2;
}
else if (choice == 4) {
ch = '/';
x[i] = num1 / num2;
}

if (file == 0) {
printf("(%d) %d%c%d=\n", i, num1, ch, num2);
}
else {
fprintf(r, "(%d) %d%c%d=\n", i,num1, ch, num2);
}
}
integerAnswer(x); //获取答案
}

void decimals(int choice) //小数的四则运算
{
int i;
double x[100];
double num1;
double num2;
char ch;
for (i = 1; i < subject + 1; i++)
{
srand((unsigned int)time(NULL));
num1 = rand() % (max * 100) / 100.00;
num2 = rand() % (max * 100) / 100.00;
while (num2 == 0) {
num2 = rand() % (max * 100) / 100.00;
}

if (choice == 1) {
ch = '+';
x[i] = num1 + num2;
}
else if (choice == 2) {
ch = '-';
x[i] = num1 - num2;
}
else if (choice == 3) {
ch = '*';
x[i] = num1 * num2;
}
else if (choice == 4) {
ch = '/';
x[i] = num1 / num2;
}

if (file == 0) {
printf("(%d) %.2f%c%.2f=\n", i, num1, ch, num2);
}
else {
fprintf(r, "(%d) %.2f%c%.2f=\n", i,num1, ch, num2);
}
}
decimalsAnswer(x);
}
void mixInteger()
{
int i;
int num1;
int num2;
int num3;
int x[100];
char d, e;
for (i = 1; i < subject + 1; i++)
{
srand((unsigned int)time(NULL));
num1 = rand() % (max + 1);
num2 = rand() % (max + 1);
num3 = rand() % (max + 1);
while (num2 == 0) {
num2 = rand() % (max * 100) / 100.00;
}
while (num3 == 0) {
num3 = rand() % (max + 1);
}

if (i % 4 == 0) {
d = '-';
e = '*';

if (bracket == 0) {
x[i] = num1 - num2 * num3;
}
else {
x[i] = (num1 - num2) * num3;
}
}
else if (i % 3 == 0) {
d = '+';
e = '/';

if (bracket == 0) {
x[i] = num1 + num2 / num3;
}
else {
x[i] = (num1 + num2) / num3;
}
}
else if (i % 2 == 0) {
d = '-';
e = '/';

if (bracket == 0) {
x[i] = num1 - num2 / num3;
}
else {
x[i] = (num1 - num2) / num3;
}
}
else {
d = '+';
e = '*';

if( bracket == 0) {
x[i] = num1 + num2 * num3;
}
else {
x[i] = (num1 + num2) * num3;
}
}
if (file == 1) {
if (bracket == 0) {
printf("(%d) %d%c%d%c%d=\n", i, num1, d, num2, e, num3);
}
else {
printf("(%d) (%d%c%d)%c%d=\n", i, num1, d, num2, e, num3);
}
}
else {
if (file == 1) {
fprintf(r, "(%d) %d%c%d%c%d=\n", i, num1, d, num2, e, num3);
}
else {
fprintf(r, "(%d) (%d%c%d)%c%d=\n", i,num1, d, num2, e, num3);
}
}
}
integerAnswer(x);
}

void mixDecimals()
{
int i;
double x[100];
double num1;
double num2;
double num3;
char d, e;

for (i = 1; i < subject + 1; i++)
{
srand((unsigned int)time(NULL));
num1 = rand() % (max * 100) / 100.00;
num2 = rand() % (max * 100) / 100.00;
num3 = rand() % (max * 100) / 100.00;
while (num2 == 0) {
num2 = rand() % (max * 100) / 100.00;
}
while (num3 == 0) {
num3 = rand() % (max * 100) / 100.00;
}

if (i % 4 == 0) {
d = '-';
e = '*';

if (bracket == 0) {
x[i] = num1 - num2 * num3;
}
else {
x[i] = (num1 - num2) * num3;
}
}
else if (i % 3 == 0) {
d = '+';
e = '/';

if (bracket == 0) {
x[i] = num1 + num2 / num3;
}
else {
x[i] = (num1 + num2) / num3;
}
}
else if (i % 2 == 0) {
d = '-';
e = '/';

if (bracket == 0) {
x[i] = num1 - num2 / num3;
}
else {
x[i] = (num1 - num2) / num3;
}
}
else {
d = '+';
e = '*';

if (bracket == 0) {
x[i] = num1 + num2 * num3;
}
else {
x[i] = (num1 + num2) * num3;
}
}
if (file == 0) {
if (bracket == 0) {
printf("(%d) %.2f%c%.2f%c%.2f=\n", i, num1, d, num2, e, num3);
}
else {
printf("(%d) (%.2f%c%.2f)%c%.2f=\n",i, num1, d, num2, e, num3);
}
}
else {
if (bracket == 0) {
fprintf(r, "(%d) %.2f%c%.2f%c%.2f=\n", i, num1, d, num2, e, num3);
}
else {
fprintf(r, "(%d) (%.2f%c%.2f)%c%.2f=\n",i, num1, d, num2, e, num3);
}
}
}

decimalsAnswer(x);
}

void integerAnswer(int y[])
{
int i;
if (file == 0) {
printf("\n正确答案：\n");
for (i = 1; i < subject + 1; i++)
{
printf("(%d) %d\n", i, y[i]);
}

}
else {
fprintf(r, "\n正确答案：\n");
for (i = 1; i < subject + 1; i++)
{
fprintf(r,"(%d) %d\n", i, y[i]);
}

}
}

void decimalsAnswer(double y[])
{
int i;
if (file == 0) {
printf("\n正确答案：\n");
for (i = 1; i < subject + 1; i++)
{
printf("(%d) %.2f\n", i, y[i]);
}
}
else {
fprintf(r, "\n正确答案：\n");
for (i = 1; i < subject + 1; i++)
{
fprintf(r, "(%d) %.2f\n", i, y[i]);
}
}
}

 

标签：num1,num2,num3,int,else,软件工程,实验,printf,源代码
From： https://www.cnblogs.com/LunarJia/p/16886463.html