[C++]Представление самого минимума.
Поковырялся в загашниках.
нашел прогу.Здесь представлено:Операторы сравнения и логические операторы,Побитовые операторы,Условные операторы,Оператор switch,Операторы перехода,Операторы цикла,Массивы,Запись результатов .Мб кому то поможет...:umnik200:
Код:
#include<iostream.h>
#include<math.h>
#include<stdio.h>
void kwad()
{
{
float a,b,c,d;
double x1,x2;
char key;
do
{
cout<<"vvedite a=";
cin>>a;
cout<<"vvedite b=";
cin>>b;
cout<<"vvedite c=";
cin>>c;
d=b*b-4*a*c;
if(a==0 && b==0 && c==0)
{
cout<<"x=luboe 4islo \n";
}
else if(a==0&&b!=0&&c!=0)
{
x1=-c/b;
cout<<"x= "<<x1 << "\n";
}
else if(c==0)
{
x1=-b/a;
cout<<"x1=0 \n"<<"x2= "<<x1 <<"\n";
}
else
if (a!=0&&b==0&&c!=0)
if(c<0&&a>0||c>0&&a<0)
{
x1=sqrt(-c/a);
x2=-sqrt(-c/a);
cout<<"x1="<<x1 << "\n";
cout<<"x2="<<x2 << "\n";
}
else
{
cout<<"net resheniya,povtorite vvod \n";
continue;
}
if(c!=0 && a!=0 && b!=0)
{
{
if(d<0)
{
cout<<"d="<<d<<"\n";
cout<<"d=otricatelen"<<"\n";
cout<<"net resheniya,povtorite vvod \n";
continue;
}
else if(d==0)
{
cout<<"d="<<d<<"\n";
x1=-b/(2*a);
cout<<"x= "<<x1<<"\n" ;
}
else if(d>0)
{
cout<<"d="<<d<<"\n";
x1=(-b+sqrt(d))/(2*a);
x2=(-b-sqrt(d))/(2*a);
cout<<"x1="<<x1<<"\n";
cout<<"x2="<<x2<<"\n";
}
}
}
cout<<"vixod?[y/n] \n";
cin>>key;
}
while (key!='y');}
}
void systema ()
{
char kw;
int t0[10],t1[10];
double x[10],y[10];
float a;
int c,d,i=0,j=0;
FILE *fp;
do
{
fp=fopen("resh_system.txt","a");
if (!fp)
{
printf("error\n");
}
else
{
printf("Idet zapis' v resh_systemi.txt\n");
cout<<"\n"
<<" Reshit sistemu:\n"
<<" x=at-dsin(t0)\n"
<<" y=a-dcos(t1)\n"
<<" Vvedite a=";
cin>>a;
cout<<" Vvedite d=";
cin>>d;
cout<<"\n"
<<" vveddite 10 znac4eniy t0:";
for(i=1;i<=10;i++)
{
cin>>t0[i];
}
cout<<"\n"
<<"vveddite 10 zna4eniy t1:";
for(j=1;j<=10;j++)
{
cin>>t1[j];
}
for(i=1;i<=10;i++)
{
x[i]=(a*t0[i])-(d*cos(t0[i]));
cout<<"x["<<i<<"]="<<x[i]<<"\n";
fprintf(fp, "x%i=%f ",i,x[i]);
}
cout<<"\n";
fprintf(fp,"\n");
for(j=1;j<=10;j++)
{
y[j]=(a-(d*cos(t1[j])));
cout<<"y["<<j<<"]="<<y[j]<<"\n";
fprintf(fp, "y%i=%f ",j,y[j]);
}
cout<<"\n";
fprintf(fp," \n");
fprintf(fp,"\n");
fclose(fp);
if (fclose(fp)!=EOF)
{
printf("error.file not cl");
}
}
cout<<"Vixod?'[y/n]\n";
cin>>kw;
}
while (kw!='y');
}
void main ()
{
char i,q;
do
{
cout<<"\n"
<<" Menu \n"
<<"\n"
<<"vibirite gelaemoe deystvie\n"
<<"1-reshinie kwadratnogo yrawneniya\n"
<<"2-dla resheniya sistemy x=at-dsint\n"
<<" y=a-dcost\n"
<<"3-vixod iz prilogeniya\n"
<<"\n"
;
cin>>i;
switch (i)
{
case '1':kwad ();continue;
case '2':systema ();continue;
case '3':cout<<"mogete prosmotret' poslednie otveti na 2e(esli ono bilo resheno) w resh_systemi.txt\n"; break;
default: cout<<"4itaem vnimatel'no menu\n";continue;
}
cout<<"Viiti iz programmi? [y/n]\n";
cin>>q;
}
while(q!='y');
}
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