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int n=0;
n++;
summa+=(float)n;
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scanf ( _, _);
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d ( int);
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f ( float);
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<Enter> () , .
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1.
/* :*/
/* r h.*/
/* :*/
#include<CONIO.H>
#include<STDIO.H>
#define pi 3.1415 /* π*/
void main(void) /* */ {
float r,h,v,s;/*v - , s */
clrscr(); /* */
printf(" : ");
/* */
scanf("%f",&h); /*
*/
|
|
|
printf(" : ");
scanf("%f",&r);
v=pi*r*r*h; /* */
s=2*pi*r*h;
printf("\n =%f",v);
printf("\n \
=%f",s);
printf("\n ...");
getch(); /* */
}
2.
/* .*/
#include<CONIO.H>
#include<STDIO.H>
#include<STDLIB.H>
#include<MATH.H>
void main(void){
int num, /* */
i,j,k,l, /* */
p; /* */
clrscr(); /* */
printf(" : ");
scanf("%d",&num);
num=abs(num);
printf(" %d: ",num);
i=num/1000;
j=num/100%10;
k=num/10%10;
l=num%10;
printf("%d %d %d %d\n",i,j,k,l);
p=i*j*k*l;
printf(" %d : %d",num,p);
printf("\n ...");
getch(); /* */
}
3.
:
, Î(0;19] Da=0.5.
#include<STDLIB.H>
#include<CONIO.H>
#include<STDIO.H>
#include<MATH.H>
void main(){
float a,y,da,a1,a2;
int i=0;
clrscr();
printf(" :");
scanf("%f",&da);
printf(" :");
scanf("%f",&a1);
printf(" :");
scanf("%f",&a2);
for(a=a1;a<a2;a+=da){
i++;
if(1<a && a<5)/* : 1<a a<5 */
{y=a;printf(" a=%.2f y=%.3f",a,y);}
if(9<a && a<19)
{y=a*a;printf(" a=%.2f y=%.3f",a,y);}
if(a>=5 && a<=9)
{y=a*a*a;printf(" a=.2%f y=%.3f",a,y);}
printf("\n");
if(i>24)
{getch();i=0;}
}
getch();
}
:
1. , , .
2. . .
3. . . .
4. . . .
5. . .
6. . .
7. #include<> #define.
8. .
9. .
:
1. , . .
2. . .
3. . .
4. . .
5. , . .
6. , A, B, C . .
7. . , [a,b].
8. , . .
9. , b, c , ax2+bx+c=0, .
10. , .
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11. , .
12. . , .
13. 12 , .
14. . , .
15. , , . .
16. , x, y, z. .
17. , x, y, u, w. .
18. .
19. . . , . .
20. ax=b.
21. , x, y.
22. k- . , . .
2
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while ( ) :
while (_)
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_ . , . . 0, , _ . ( ). , _ . _ . , _ 0.
:
...
i=2;
b=1.0;
r=x;
while(r>eps || r<eps)/* || */
{
b=b+r;
r=r*x/i;
i++;
}
for () :
for(_1;_;_2)
_
for , . _1 , , . . ; . _ . . _2 . _2 _ . , _1 , _ _2 . , _. for , ; . _, , . for _1 , , , :
|
|
|
:
b=1.0;
r=x;
for(i=2;r>eps||r<-eps;i++){
b=b+r;
r=r*x/i;
}
:
for(i=2,b=1.0,r=x;r>eps||r<-eps; b+=r, r*=x/i, i++);
.
do ( ) :
do
_
while (_)
_ , while. do , , . _ ( 0), (. . 0), . .
:
i=1;
b=0.0;
r=1.0;
do {
b=b+r;
r=r*x/i;
i++;
} while (r>=eps || r<=-eps);
:
1. for.
2. while.
3. do.
4. break.
5. continue.
:
1. Z=1+2+3+.... , Z .
2. a1, a2,...,aN, i=random(N). ( ), .
3. 
i=1/i. i.
4. N. , .
5. N. N : 1/2*7/8*13/14*19/20*....
6. .
7. N. 
8. .
9. .
10. Z=1+2-3+4-5.... , Z .
11. z=(a+b)/i, 0 1, b 5 1, i=1,...,N. b i.
12. . 1, 1+1/2, 1+1/2+1/3+... , .
13. sinx+sin2x+...+sinnx
14. F0=F1=1; Fi=Fi-1+Fi-2 i=2,3,... , (>0).
15. sinx+sinx2+...+sinxn
16. , ( , ).
17. a, b, c, d y=ax3+bx2+cx+d , . x 0 2 0,2.
18. , .
19. N. i3-3*i*N+N, i=1,2,...,N, .
20. . , 0.
3
: .
(4 )
, . :
_ _ [ ];
(sizeof()* _) . 0, . . 0 N-1, N .
, :
_ [ _ ].
:
char name [20];
int grades [125];
float income [30];
double m [1500];
, , , . . , float Z[13][10] Z 13 -, , , 10 float.
, . . , . , 31.
|
|
|
, . . . . . , , :
int m[]={1,2,3,4,5};
m[0]=1, m[1]=2, m[2]=3, m[3]=4, m[4]=5.
int m1[3][2]={{1,2},{3,4},{5,6}};
m1[0][0]=1, m1[0][1]=2, m1[1][0]=3, m1[1][1]=4, m1[2][0]=5, m1[2][1]=6. :
int m1[3][2]={1,2,3,4,5,6};
. , , . , . .
. , , . . .
:
for( ){
1;
N;
for( ){
1;
N;
}
}
while dowhile.
while(){
1;
N;
while(){
1;
N;
}
}
break continue. , . break . continue .
( ), , / .
:
1. .
2. .
3. .
4. .
5. break continue .
:
