早年作品,不是今天发现,恐怕要永远丢了。
解方程的种类包括:
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本人热衷于数据库技术及算法的研究,志同道合之士, 欢迎探讨
#include
#include
main()
{
code_fun();
}
code_fun()
{long int code=123,accept_code,j;
for(j=0;j<3;j++)
{
printf("Qing shu ru mi ma:");
scanf("%ld",&accept_code);
if(j<2)
{
if(code==accept_code)
{clrscr();menu();break;}
else
{clrscr();printf("Mi ma cuo wu!Ni hai you %d ji hui.\n\n",2-j);}
}
else
{
printf("\nDui bu qi,Ni yi jing shu ru cuo wu 3 ci,An ren yi jian tui chu.\n");
getch();
tui_chu();
}
}
}
tui_chu()
{
}
menu()
{
int variable_1;
printf("\n\n\n\n\n\n\n 1: Duo yuan yi ci fang cheng zu.\n");
printf(" 2: Yi yuan er ci fang cheng.\n");
printf(" 3: Yi yuan gao ci fang cheng.\n");
printf(" 4: Jin zhi zhuan huan.\n");
printf(" 5: Lian xi wo.\n");
printf(" 6: Tui chu.\n");
printf(" Qing shu ru:");
scanf("%d",&variable_1);
if(variable_1>0&&variable_1<7)
{
switch(variable_1)
{
case 1:duo_yuan_yi_ci();break;
case 2:yi_yuan_er_ci();break;
case 3:yi_yuan_gao_ci();break;
case 4:jin_zhi_zhuan_huan();break;
case 5:contact_me();break;
case 6:break;
}
}
else
{
clrscr();
printf("Shu ru cuo wu,Qing chong xin shu ru.");
menu();
}
}
duo_yuan_yi_ci()/*属于menu()*/
{
int variable_2;
clrscr();
printf("\n\n\n\n\n\n\n 1: Er yuan yi ci.\n");
printf(" 2: San yuan yi ci.\n");
printf(" 3: Si yuan yi ci.\n");
printf(" 4: Hui zhu cai dan.\n");
printf(" Qing shu ru:");
scanf("%d",&variable_2);
switch(variable_2)
{
case 1:er_yuan_yi_ci();break;
case 2:san_yuan_yi_ci();break;
case 3:si_yuan_yi_ci();break;
case 4:{clrscr();menu();}
}
}
er_yuan_yi_ci()/*属于duo_yuan_yi_ci()*/
{float a1,b1,c1,a2,b2,c2;
clrscr();
printf("Fang cheng mo shi wei: a1*x+b1*y=c1\n");
printf(" a2*x+b2*y=c2\n");
printf("\n\nQing shu ru a1:");
scanf("%f",&a1);
printf("Qing shu ru b1:");
scanf("%f",&b1);
printf("Qing shu ru c1:");
scanf("%f",&c1);
printf("\n");
printf("Qing shu ru a2:");
scanf("%f",&a2);
printf("Qing shu ru b2:");
scanf("%f",&b2);
printf("Qing shu ru c2:");
scanf("%f",&c2);
if(a1/a2!=b1/b2)
{
printf("\n");
printf("x=%f\n",-((b1*c2-b2*c1)/(a1*b2-a2*b1)));
printf("y=%f\n",(a1*c2-a2*c1)/(a1*b2-a2*b1));
}
else
{
printf("\n");
printf("a1/a2=b1/b2,fang cheng wu li.");
}
printf("\n");
printf("Fang cheng wu li,An ren yi jian hui zhu cai dan.");
getch();
clrscr();
menu();
}
san_yuan_yi_ci()/*属于duo_yuan_yi_ci()*/
{
float a1,b1,c1,d1, a2,b2,c2,d2, a3,b3,c3,d3, x,y,z;
clrscr();
/*标注模式*/
printf("Fang cheng mo shi wei:a1*x+b1*y+c1*z=d1\n");
printf(" a2*x+b2*y+c2*z=d2\n");
printf(" a3*x+b3*y+c3*z=d3\n");
printf("Qing shu ru a1:");
scanf("%f",&a1);
printf("Qing shu ru b1:");
scanf("%f",&b1);
printf("Qing shu ru c1:");
scanf("%f",&c1);
printf("Qing shu ru d1:");
scanf("%f",&d1);printf("\n");
printf("Qing shu ru a2:");
scanf("%f",&a2);
printf("Qing shu ru b2:");
scanf("%f",&b2);
printf("Qing shu ru c2:");
scanf("%f",&c2);
printf("Qing shu ru d2:");
scanf("%f",&d2);printf("\n");
printf("Qing shu ru a3:");
scanf("%f",&a3);
printf("Qing shu ru b3:");
scanf("%f",&b3);
printf("Qing shu ru c3:");
scanf("%f",&c3);
printf("Qing shu ru d3:");
scanf("%f",&d3);printf("\n");
y=((d1*a2-d2*a1)*(c3*a2-c2*a3)-(d3*a2-d2*a3)*(c1*a2-c2*a1))/((b1*a2-b2*a1)*(c3*a2-c2*a3)-(b3*a2-b2*a3)*(c1*a2-c2*a1));
z=((d1*a2-d2*a1)*(b2*a3-b3*a2)-(d2*a3-d3*a2)*(b1*a2-b2*a1))/((c1*a2-c2*a1)*(b2*a3-b3*a2)-(c2*a3-c3*a2)*(b1*a2-b2*a1));
x=(d1-c1*z-b1*y)/a1;
printf("x=%f\n",x);
printf("y=%f\n",y);
printf("z=%f\n",z);
printf("An ren yi jian hui zhu cai dan.");
getch();
clrscr();
menu();
}
si_yuan_yi_ci()/*属于duo_yuan_yi_ci()*/
{
float a1=1,b1=1,c1=1,d1=1,e1=10, a2=1,b2=2,c2=1,d2=1,e2=12, a3=1,b3=1,c3=2,d3=1,e3=13, a4=1,b4=1,c4=1,d4=2,e4=14, x,y,z,w, jian_ce_1,jian_ce_2;
jian_ce_1=(((e1*d2-e2*d1)*(a2*d3-a3*d2)-(e2*d3-e3*d2)*(a1*d2-a2*d1))*((b2*d3-b3*d2)*(a3*d4-a4*d3)-(b3*d4-b4*d3)*(a2*d3-a3*d2))-((e2*d3-e3*d2)*(a3*d4-a4*d3)-(e3*d4-e4*d3)*(a2*d3-a3*d2))*((b1*d2-b2*d1)*(a2*d3-a3*d2)-(b2*d3-b3*d2)*(a1*d2-a2*d1)));
jian_ce_2=(((c1*d2-c2*d1)*(a2*d3-a3*d2)-(c2*d3-c3*d2)*(a1*d2-a2*d1))*((b2*d3-b3*d2)*(a3*d4-a4*d3)-(b3*d4-b4*d3)*(a2*d3-a3*d2))-((c2*d3-c3*d2)*(a3*d4-a4*d3)-(c3*d4-c4*d3)*(a2*d3-a3*d2))*((b1*d2-b2*d1)*(a2*d3-a3*d2)-(b2*d3-b3*d2)*(a1*d2-a2*d1)));
printf("%f,%f",jian_ce_1,jian_ce_2);
getch();
z=(((e1*d2-e2*d1)*(a2*d3-a3*d2)-(e2*d3-e3*d2)*(a1*d2-a2*d1))*((b2*d3-b3*d2)*(a3*d4-a4*d3)-(b3*d4-b4*d3)*(a2*d3-a3*d2))-((e2*d3-e3*d2)*(a3*d4-a4*d3)-(e3*d4-e4*d3)*(a2*d3-a3*d2))*((b1*d2-b2*d1)*(a2*d3-a3*d2)-(b2*d3-b3*d2)*(a1*d2-a2*d1)))/(((c1*d2-c2*d1)*(a2*d3-a3*d2)-(c2*d3-c3*d2)*(a1*d2-a2*d1))*((b2*d3-b3*d2)*(a3*d4-a4*d3)-(b3*d4-b4*d3)*(a2*d3-a3*d2))-((c2*d3-c3*d2)*(a3*d4-a4*d3)-(c3*d4-c4*d3)*(a2*d3-a3*d2))*((b1*d2-b2*d1)*(a2*d3-a3*d2)-(b2*d3-b3*d2)*(a1*d2-a2*d1)));
printf("%f",z);
getch();
}
yi_yuan_er_ci()/*属于menu*/
{
float a,b,c,d,x1,x2;/*d设计为判别式*/
clrscr();
printf("Fang cheng mo shi wei: a*x*x+b*x+c=0\n");
printf("\n\nQing shu ru a:");
scanf("%f",&a);
printf("Qing shu ru b:");
scanf("%f",&b);
printf("Qing shu ru c:");
scanf("%f",&c);
d=b*b-4*a*c;
printf("\n");
printf("\nfen xi jie guo wei:");
if(d==0)/*注意:C里面的等号为“==”*/
{printf("\n\nx1=x2=%f\n",(-b)/(2*a));
printf("zhong zhou wei: x=%f\n",(-b)/(2*a));
printf("ding dian wei:(%f,%f)\n",(-b)/(2*a),(4*a*c-b*b)/(4*a));}
else if(d>0)
{printf("\n\nx1=%f\nx2=%f\n",((-b)+sqrt(d))/(2*a),((-b)-sqrt(d))/(2*a));
printf("zhong zhou wei: x=%f\n",(-b)/(2*a));
printf("ding dian wei:(%f,%f)\n",(-b)/(2*a),(4*a*c-b*b)/(4*a));}
else
{printf("\n\nfang cheng wu shi gen.\n");
printf("zhong zhou wei: x=%f\n",(-b)/(2*a));
printf("ding dian wei:(%f, %f)\n",(-b)/(2*a),(4*a*c-b*b)/(4*a));}
printf("Press any key to back menu.");
getch();
clrscr();
menu();
}
yi_yuan_gao_ci()
{
int veriable_9;
clrscr();
printf("\n\n\n\n\n\n\n");
printf(" 1.yi yuan san ci.\n");
printf(" 2.yi yuan si ci.\n");
printf(" 3.Back menu.\n");
printf(" Qing shu ru:");
scanf("%d",&veriable_9);
if(veriable_9>0&&veriable_9<4)
{
switch(veriable_9)
{
case 1:yi_yuan_san_ci();break;
case 2:yi_yuan_si_ci();break;
case 3:{clrscr();menu();}break;
}
}
else
{
printf("shu ru cuo wu,an ren yi jian chong xin xuan ze.");
getch();
clrscr();
yi_yuan_gao_ci();
}
}
float f(float a9,float b9,float c9,float d9, float x)/*属于yi_yuan_gao_ci()*/
{
float y;
y=a9*x*x*x+b9*x*x+c9*x+d9;
return(y);
}
yi_yuan_san_ci()/*属于menu()*/
{
float x1,x2,x3,a8,b8,c8,d8;
clrscr();
printf("fang cheng mo shi wei:a*x*x*x+b*x*x+c*x+d=0\n");
printf("qing shu ru a: ");
scanf("%f",&a8);
printf("qing shu ru b: ");
scanf("%f",&b8);
printf("qing shu ru c: ");
scanf("%f",&c8);
printf("qing shu ru d: ");
scanf("%f",&d8);
printf("Please input an area that include one root(like 1,2):");
scanf("%f,%f",&x1,&x2);
if(f(a8,b8,c8,d8,x1)*f(a8,b8,c8,d8,x2)>0)
{printf("yi xia shi bu neng dei dao gen de san zhong ke neng de qing kuang:\n");
printf("1.shu ru de qu jian bu bao han gen.\n");
printf("2.shu ru de qu jian bao han liang ge yi shang de gen.\n");
printf("3.zai shu ru de qu jian shang qu xian yu x zhou xiang qie.\n");
printf("Press any key to input again.");
getch();
yi_yuan_gao_ci();}
else
{
do
{
x3=(x1+x2)/2;
if(f(a8,b8,c8,d8,x3)*f(a8,b8,c8,d8,x1)>0)
x1=x3;
else
x2=x3;
}
while(fabs(f(a8,b8,c8,d8,x3))>=0.000001);/*注意写头文件“#include”*/
printf("yi ge gen shi: %f",x3);
printf("\n");
printf("An ren yi jian hui zhu cai dan.");
getch();
clrscr();
menu();
}
}
float f1(float a,float b,float c,float d,float e, float x)/*属于yi_yuan_gao_ci()*/
{
float y;
y=a*x*x*x*x+b*x*x*x+c*x*x+d*x+e;
return(y);
}
yi_yuan_si_ci()/*属于menu()*/
{
float x1,x2,x3,a,b,c,d,e;
clrscr();
printf("fang cheng mo shi wei:a*x*x*x*x+b*x*x*x+c*x*x+d*x+e=0\n");
printf("qing shu ru a: ");
scanf("%f",&a);
printf("qing shu ru b: ");
scanf("%f",&b);
printf("qing shu ru c: ");
scanf("%f",&c);
printf("qing shu ru d: ");
scanf("%f",&d);
printf("qing shu ru e: ");
scanf("%f",&e);
printf("Please input an area that include one root(like 1,2):");
scanf("%f,%f",&x1,&x2);
if(f1(a,b,c,d,e,x1)*f1(a,b,c,d,e,x2)>0)
{printf("yi xia shi bu neng dei dao gen de san zhong ke neng de qing kuang:\n");
printf("1.shu ru de qu jian bu bao han gen.\n");
printf("2.shu ru de qu jian bao han liang ge yi shang de gen.\n");
printf("3.zai shu ru de qu jian shang qu xian yu x zhou xiang qie.\n");
printf("Press any key to input again.");
getch();
yi_yuan_gao_ci();}
else
{
do
{
x3=(x1+x2)/2;
if(f1(a,b,c,d,e,x3)*f1(a,b,c,d,e,x1)>0)
x1=x3;
else
x2=x3;
}
while(fabs(f1(a,b,c,d,e,x3))>=0.0000001);/*注意写头文件“#include”*/
printf("one root is %f",x3);
printf("\n");
printf("Press any key to back menu.");
getch();
clrscr();
menu();
}
}
/*任意进制到十进制*/
unsigned long fun1()
{
unsigned long s=0;/*yjz=yuan jin zhi的首字母,即是原来的数是多少进制*/
int i,yjz,veriable_3,a[8];
printf("Qing shu ru yao zhuan huan de shu de jin zhi:\n");
scanf("%d",&yjz);/*注意地址引用符&*/
if(yjz>1&&yjz<11)
{
printf("Qing shu ru ni de shu ju de 8 wei xing shi\n");
for(i=0;i<=7;i++)
{printf("di %d wei: ",8-i);
scanf("%d",&a[i]);
}
for(i=0;i<=7;i++)
s=s+a[i]*(unsigned long)pow(yjz,7-i);
return(s);
}
else
{
printf("Bao qian,zhi neng zai 2-10 jin zhi zhi jian jin xing zhuan huan.\n\n");
printf("Press any key to continue.");
getch();
clrscr();
fun1();
}
}
/*十进制到任意进制*/
void fun2(unsigned long m)
{int i,ys[8],hjz;/*ys=yu shu,hjz=hou mian de jin zhi*/
printf("qing shu ru yao dei dao de jin zhi:\n");
scanf("%d",&hjz);
for(i=0;i<=7;i++)
{
ys[i]=m%hjz;
m=m/hjz;
}
for (i=7;i>=0;i--)
printf("%2d",ys[i]);
}
/*子主函数*/
jin_zhi_zhuan_huan()/*仅限于正数*/
{unsigned long sj;/*sj=shi jin zhi*/
clrscr();
sj=fun1();
printf("shi jin zhi wei:%ld\n",sj);
fun2(sj);
printf("\nPress any key to back menu.");
getch();
clrscr();
menu();
}
contact_me()
{
clrscr();
printf("E-mail:[email protected]\n");
printf("\n");
printf(" QQ:407-959-978\n");
printf("\n");
printf("An ren yi jian hui zhu cai dan.");
getch();
clrscr();
menu();
}