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四则运算2.cpp
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四则运算2.cpp
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#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<windows.h>
FILE* p;
int n, max, fuhao, fa, fl, kuohao, file;
void po_answer(double y[]) //小数运算答案
{
int i;
if (file == 1)
{
printf("\n正确答案:\n");
for (i = 1; i < n + 1; i++)
printf("(%d) %.2f\n", i, y[i]);
}
else
{
fprintf(p, "\n正确答案:\n");
for (i = 1; i < n + 1; i++)
fprintf(p, "(%d) %.2f\n", i, y[i]);
}
}
void zs_answer(int y[]) //整数运算答案
{
int i;
if (file == 1) //输出到文件
{
printf("\n正确答案:\n");
for (i = 1; i < n + 1; i++)
printf("(%d) %d\n", i, y[i]);
}
else //输出到屏幕
{
fprintf(p, "\n正确答案:\n");
for (i = 1; i < n + 1; i++)
fprintf(p, "(%d) %d\n", i, y[i]);
}
}
void zhengshusize() //简单运算,整数的四则运算
{
int i, a, b, x[1000];
char c;
for (i = 1; i < n + 1; i++)
{
a = rand() % max; //随机数获取
b = rand() % max;
if (fuhao == 1)
{
c = '+';
x[i] = a + b;
}
else if (fuhao == 2)
{
c = '-';
x[i] = a - b;
}
else if (fuhao == 3)
{
c = '*';
x[i] = a * b;
}
else if (fuhao == 4)
{
c = '/';
while (b == 0)
{
b = rand() % max;
}
x[i] = a / b;
}
if (file == 1)
printf("(%d) %d%c%d=\n", i, a, c, b);
else
fprintf(p, "(%d) %d%c%d=\n", i, a, c, b);
}
zs_answer(x); //获取答案
}
void xiaoshusize() //简单运算,小数的四则运算
{
int i;
double x[1000], a, b;
char c;
for (i = 1; i < n + 1; i++)
{
a = rand() % (max * 100) / 100.00; //随即小数获取
b = rand() % (max * 100) / 100.00;
if (fuhao == 1)
{
c = '+';
x[i] = a + b;
}
else if (fuhao == 2)
{
c = '-';
x[i] = a - b;
}
else if (fuhao == 3)
{
c = '*';
x[i] = a * b;
}
else if (fuhao == 4)
{
c = '/';
while (b == 0)
{
b = rand() % (max * 100) / 100.00 + 1;
}
x[i] = a / b;
}
if (file == 1)
printf("(%d) %.2f%c%.2f=\n", i, a, c, b);
else
fprintf(p, "(%d) %.2f%c%.2f=\n", i, a, c, b);
}
po_answer(x); //获取答案
}
void mixDecimals() //混合运算(小数)
{
int i;
double x[1000], a, b, c;
char d, e;
for (i = 1; i < n + 1; i++)
{
a = rand() % (max * 100) / 100.00 + 1;
b = rand() % (max * 100) / 100.00 + 1;
c = rand() % (max * 100) / 100.00 + 1;
if (i % 4 == 0) // a-b*c,(a-b)*c
{
d = '-';
e = '*';
if (kuohao == 1) //有括号
x[i] = a - b * c;
else
x[i] = (a - b) * c;
}
else if (i % 3 == 0) //a+b/c,(a+b)/c
{
d = '+';
e = '/';
while (b == 0)
{
c = rand() % (max * 100) / 100.00 + 1;
}
if (kuohao == 1)
x[i] = a + b / c;
else
x[i] = (a + b) / c;
}
else if (i % 2 == 0) //a-b/c,(a-b)/c
{
d = '-';
e = '/';
while (b == 0)
{
b = rand() % (max * 100) / 100.00 + 1;
}
if (kuohao == 1)
x[i] = a - b / c;
else
x[i] = (a - b) / c;
}
else //a+b*c,(a+b)*c
{
d = '+';
e = '*';
if (kuohao == 1)
x[i] = a + b * c;
else
x[i] = (a + b) * c;
}
if (file == 1)
{
if (kuohao == 1)
printf("(%d) %.2f%c%.2f%c%.2f=\n", i, a, d, b, e, c);
else
printf("(%d) (%.2f%c%.2f)%c%.2f=\n", i, a, d, b, e, c);
}
else
{
if (kuohao == 1)
fprintf(p, "(%d) %.2f%c%.2f%c%.2f=\n", i, a, d, b, e, c);
else
fprintf(p, "(%d) (%.2f%c%.2f)%c%.2f=\n", i, a, d, b, e, c);
}
}
po_answer(x); //获取答案
}
void hunheyunsuan1() //混合运算(整数)
{
int i, a, b, c;
int x[1000];
char d, e;
for (i = 1; i < n + 1; i++)
{
a = rand() % max;
b = rand() % max;
c = rand() % max;
if (i % 4 == 0) // a-b*c,(a-b)*c
{
d = '-';
e = '*';
if (kuohao == 1) //无括号
x[i] = a - b * c;
else //有括号
x[i] = (a - b) * c;
}
else if (i % 3 == 0) //a+b/c,(a+b)/c
{
d = '+';
e = '/';
while (c == 0)
{
c = rand() % max;
}
if (kuohao == 1)
x[i] = a + b / c;
else
x[i] = (a + b) / c;
}
else if (i % 2 == 0) //a-b/c,(a-b)/c
{
d = '-';
e = '/';
while (c == 0)
{
c = rand() % max;
}
if (kuohao == 1)
x[i] = a - b / c;
else
x[i] = (a - b) / c;
}
else //a+b*c,(a+b)*c
{
d = '+';
e = '*';
if (kuohao == 1)
x[i] = a + b * c;
else
x[i] = (a + b) * c;
}
if (file == 1) //输出到屏幕
{
if (kuohao == 1)
printf("(%d) %d%c%d%c%d=\n", i, a, d, b, e, c);
else
printf("(%d) (%d%c%d)%c%d=\n", i, a, d, b, e, c);
}
else //输出到文件
{
if (kuohao == 1)
fprintf(p, "(%d) %d%c%d%c%d=\n", i, a, d, b, e, c);
else
fprintf(p, "(%d) (%d%c%d)%c%d=\n", i, a, d, b, e, c);
}
}
zs_answer(x); //获取答案
}
int main()
{
printf("\n\n\t*******************欢迎进入小学生四则运算自动生成程序*******************\n\n");
printf("\n--------------------本程序适用于小学,小数均保留两位数计算------------------------\n\n");
printf("1.请定制题目数量:");
scanf("%d", &n);
printf("\n2.请选择运算符号(1.加法 2.减法 3.乘法 4.除法 5.混合运算):");
scanf("%d", &fuhao);
printf("\n3.请设置练习的最大数(如十以内、百以内等):");
scanf("%d", &max);
printf("\n4.请设置是否有小数(1.无 2.有):");
scanf("%d", &fl);
printf("\n5.请设置是否有括号(1.无 2.有)备注:此选项仅混合运算时选择,其他选项选1即可 :");
scanf("%d", &kuohao);
printf("\n6.请设置输出方式(1.直接显示在屏幕上 2.输出到文件) :");
scanf("%d", &file);
if (file == 2)
printf("\n已生成四则运算.txt文件");
p = fopen("四则运算.txt", "w");
printf("\n\n");
if (fuhao != 5)
{
if (fl == 1)
zhengshusize(); //简单运算(无小数)
else
xiaoshusize(); //简单运算(有小数)
}
else
{
if (fl == 1)
hunheyunsuan1(); //混合运算(无小数、有无括号)
else
mixDecimals(); //混合运算(有小数、有无括号)
}
fclose(p);
printf("\n是否重新运行运行该程序? <1>是 <2>退出\n");
scanf("%d", &fa);
if (fa == 1)
{
system("cls"); //清屏,重新运行
main();
}
}