1. . , .
struct funds{
char* bank;
float fonds;
char* name;
float savef;
}stan={"", 1023.87, .., 123,45};
float sum (float, float);
void main(void){
printf (" .. %.2f .\n", sum(stan.fonds,stan.savef));
}
float sum(float x, float y){
return(x+y);
}
sum() , , , float.
2. , , .
modify(&stan.savef);
3. , . .
struct funds {...} stan={...};
void main(void){
float sum (struct funds*);
printf (" .. %.2f \n", sum(&stan));
}
float sum (stuct funds* money){
return(money->fonds+money->savef);
}
money funds. , &stan.
4. . .
struct funds {...}stans[2]={{...},{...}};
void main(void){
float sum (struct funds*);
printf (" %.2f \n", sum(stans));
}
float sum(struct funds* money){
float summ;
int i;
for (i=0, summ=0;i<2; i++, money++)
summ+=money->fonds+money->savef;
return (summ);
}
money <=> &stan[0]; money++, stan[1].
1. .
struct date { int day; int month;
int year; int yearday;}d={25,3,1999};
int date_tab[2][13]={{ 0,31,28,31,30,31,30,31,31,30,31,30,31},
{ 0,31,29,31,30,31,30,31,31,30,31,30,31}};
int day_of_year(struct date *pd) {
int i, day, l=0;
day = pd->day;
if(pd->year%4==0&&pd->year%100!=0||pd->year%400==0) // .
l=1;
for(i=0; i< pd->month; i++)
day+=date_tab[l][i];
return(day);
}
void main(void) {
d.yearday=day_of_year(&d); - .
printf(%d, d.yearday);
}
- , . , , .
. union. .
union simbl {
int digit;
double bigfl;
char letter;
};
union simbl fit, save[10], *pu.
bigfl (double 8 ), save[10] (10 x 8) .
|
|
|
?
fit.digit=23; (. 2)
fit.bigfl=2.0 (23 2.0)
fit.letter='a' (2.0 'a' 1)
pu=&fit; x=pu->digit;
.
++ . , :
union {
int digit;
double bigfl;
char letter;
};
; , .
digit=23;
bigfl=2.0
.
, .
typedef.
:
typedef int INT //INT- int
INT x, y;
typedef unsigned size_t;
size_t x, y; // unsigned
typedef char string[225];
string array; //char array[225];
1. typedef .
2. .
3. , #define.
real float:
typedef float real;
real x, y[5], *px;
, , .
typedef char* STRING //STRING- char.
STRING name, sign; //char*name,*sign;
