چند تمرین به زبان c

تمرین شماره 1

include

#include

int main()

{ int *x, *y, s;

clrscr();

x = (int *) malloc(sizeof(int));

if(!x){ printf(“\n allocation failure.”);

exit(1); }

y = (int *) malloc(sizeof(int));

if(!y){ printf(“\n allocation failure.”);

exit(1); }

printf(“\n enter two integers:”);

scanf(“%d%d”, x, y);

s = *x * *x + *y * *y;

printf(“\n sum of square is:%d”, s);

free(x);

free(y);

getch();

return 0;}

enter two integers:150

200

sum of square is:-3036

تمرین شماره 2

#include

void swap(int *, int *);

int main()

{

int x = 10, y = 20 ;

clrscr();

printf("\n first value of x,y are:%d, %d", x, y) ;

swap(&x, &y);

printf("\n final value of x, y are:%d, %d", x, y) ;

getch();

return 0;

}

void swap(int *a, int *b)

{

int temp ;

temp=*a ;

*a=*b ;

*b=temp ;

}

first value of x,y are:10, 20

final value of x, y are:20, 10

تمرین شماه 3

#include

void winput(int *, int *);

void rect(int, int, int *, int *);

int main()

{

int len, wid, area, per;

clrscr();

winput(&len, &wid);

rect(len, wid, &area, &per);

printf(" length = %d, width = %d", len, wid);

printf("\n area = %d, perimer = %d", area, per);

getch();

return 0;

}

//**************************

void winput(int *p1, int *p2)

{

printf(" enter length, width :");

scanf("%d%d", p1, p2);

}

//***************************

void rect(int x, int y, int *a, int *p)

{

*a = x * y;

*p = 2 * (x + y);

}

enter length, width :15

length = 15, width = 20

area = 300, perimer = 70

تمرین شماره 4

#include

void check(char *a, char *b, int (*cmp)(const char *, const char *));

//int cmp(char *, char *);

int main()

{

char s1[80], s2[80] ;

int (*p)(const char *, const char *);

clrscr();

p = strcmp;

printf(" enter first string :") ;

gets(s1) ;

printf(" enter second string :") ;

gets(s2) ;

check(s1, s2, p);

getch();

return 0;

}

//*********************

void check(char *a, char *b, int (*cmp)(const char *, const char *))

{

if(!(cmp)(a, b))

printf(" the strings are equal.");

else

printf(" strings are not equal.");

}

تمرین شماره 5

enter first string :ali

enter second string :reza

strings are not equal.

#include

int main()

{

int arr[5] ,i ;

clrscr();

printf("\n enter five value :") ;

for(i=0 ; i<5 ; i++)

scanf("%d",&arr[i]) ;

printf("\n the reverse output is :");

for(i=4 ; i>=0 ; i -- )

printf("%4d",*(arr+i)) ;

getch();

return 0;

}

enter five value :5

the reverse output is : 5 5 3 2 5

تمرین شماره 6

#include

void pinput(int *, int);

void bubble(int *, int);

void median(int *, int, float *);

void pout(int *, int);

int main()

{

int n, i;

int *p;

float mead;

clrscr();

printf(" enter number of items(n):");

scanf("%d", &n);

p = (int *)malloc(n * sizeof(int));

if(!p){

printf(" aloocation failure!");

getch();

exit(1);

}

pinput(p, n);

bubble(p, n);

printf("\n sorted data are:");

pout(p, n);

median(p, n, &mead);

printf("\n median = %5.2f", mead);

getch();

return 0;

}

//*****************************

void pinput(int *p, int n)

{

int i;

for(i = 0; i < n; i ++){

printf("enter number %d:", i + 1);

scanf("%d", p + i);

}

//*****************************

void bubble(int *temp, int len)

{

int i, j, item;

for(i = len - 1 ; i > 0; i --)

for(j = 0; j < i ; j++)

if(*(temp + j) > *(temp + j + 1)) {

item = *(temp + j);

*(temp + j) = *(temp + j + 1);

*(temp + j + 1) = item ;

}//end of if

}

//*************************

void median(int *x, int n, float *mead)

{ if(n % 2 == 0)

*mead =(float) (*(x + ((n - 1) / 2)) + *(x + (n / 2))) / 2;

else

*mead = *(x + (n - 1) / 2);}

//****************

void pout(int *p, int n)

{ int i;

for(i = 0; i < n; i ++){

printf("%3d",*(p+i)); }

printf("\n");

}

enter number of items(n):10

enter number 1:15

enter number 2:25

enter number 3:62

enter number 4:5

enter number 5:55

enter number 6:52

enter number 7:54

enter number 8:1

enter number 9:4

enter number 10:56

sorted data are: 1 4 5 15 25 52 54 55 56 62

median = 38.50

تمرین شماره 7

#include

int char_count(char *, char);

int main()

{

char string[40] , ch ;

int count ;

clrscr();

printf(" enter string for search:");

gets(string) ;

printf(" enter a character:") ;

ch = getche() ;

count = char_count(string, ch) ;

printf("\n number of occurs of char ") ;

printf(" <%c> is:%d", ch, count);

getch();

return 0;

}

//******************

int char_count(char *s, char letter)

{

int count=0 ;

while(*s)

if(*s++ == letter)

count ++ ;

return(count) ;

}

enter string for search:ali

enter a character:a

number of occurs of char is:1

تمرین شماره 8

#include

first_dif(char *, char *, int);

int main()

{

char st1[40], st2[40] ;

int compcase = 1 ;

clrscr();

printf(" enter first string:") ;

gets(st1) ;

printf(" enter second string:");

gets(st2) ;

first_dif(st1, st2, compcase) ;

getch();

return 0;

}

//********************

first_dif(char *s1, char *s2, int ignore_case)

/* if ignore_case is 1 ,ignore case

of letter */

{

int i ;

char a , b ;

for(i = 0; *s1 && *s2; s1++, s2++, i++)

if(*s1 != *s2) {

if(ignore_case) {

a = (*s1 >= 'a' && *s1 <= 'z') ? *s1 -= 32 : *s1;

b = (*s2 >= 'a' && *s2 <= 'z') ? *s2 -= 32 : *s2;

if(a != b)

break ;

}//end of if

else

break;

}//end of if

if(*s1 || *s2) {

printf("\n strings are not equal,");

printf(" the first difference occurs in :%d", i + 1);

}

else

printf("\n strings are equal .") ;

}

enter first string:ali reza

enter second string:ebrahim ghomi

strings are not equal, the first difference occurs in :1

تمرین شماره 9

#include

void ascii_to_int(int *, char *);

int main()

{

int number ;

char s[10] ;

clrscr();

printf("\n enter numeric string:");

gets(s) ;

ascii_to_int(&number, s) ;

printf(" numeric value is:%d", number) ;

getch();

return 0;

}

//**************************

void ascii_to_int(int *value, char *str)

{

int sign = 1 ;

*value = 0 ;

while(*str == ' ') str++ ;

if(*str== '-' || *str == '+')

sign = (*str ++ == '-') ? -1 : 1;

while(*str)

if((*str >= '0') && (*str <= '9'))

*value = (*value * 10) + (*str ++ -48) ;

else {

printf("Watning :the <%c> is invalid character.\n", *str);

break ;

}

*value *=sign ;

}

enter numeric string:ebrahim ghomi 8705060503

Watning :the is invalid character.

numeric value is:0

تمرین شماره 10

#include

void int_to_ascii(int , char *);

int main()

{

int number ;

char s[10] ;

clrscr();

printf(" enter a number :");

scanf("%d", &number) ;

int_to_ascii(number, s) ;

printf(" the string value is:%s", s);

getch();

return 0;

}

//**********************************

void int_to_ascii(int value, char *str)

{

int saveval= value ;

char temp, *savestr = str ;

if(value < 0)

value *= -1 ;

do{

*str ++ = (value % 10) + 48 ;

value = value / 10 ;

} while(value > 0);

if (saveval < 0)

*str++ = '-' ;

*str -- = '\0' ;

while(savestr < str) {

temp = *str ;

*str -- =* savestr ;

*savestr ++ = temp ;

}

enter a number :125

the string value is:125

تمرین شماره 11

#include

int main()

{

char *text="your name is:";

char name[41];

clrscr();

printf("\n enter your name :") ;

gets(name) ;

printf(" %s" ,text);

puts(name) ;

getch();

return 0;

}

enter your name :ebrahim ghomi

your name is:ebrahim ghomi

تمرین شماره 12

#include

int main()

{

int dex;

const int k = 5;

char name[21];

char *list[k]=

{"ali",

"ahmad",

"alireza",

"jalal",

"mohammad"

} ;

clrscr();

printf(" enter a name for search:") ;

gets(name);

for(dex = 0; dex

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چند تمرین به زبان c

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