fundamental of computing(FOC)

8/7/2019 fundamental of computing(FOC)

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PROGRAM:

\* x to the power of y*\

#includevoid main(){

int x,y;float power(int, int);

printf(" enter x and y values..");

scanf("%d%d",&x,&y);printf("%d to the power of %d is..%f",x,y,power(x,y));

}float power(int x, int y){

float p=1.0;if(y>=0)

while(y--)

p*=x;elsewhile(y++)

p/=x;return(p);

}


2/29

OUTPUT:

enter x and y values..3 63 to the power of 6 is..729.000000


3/29

PROGRAM:

\* global variable *\

#includeint a;void main(){

a=39;int f1();int f2();

int f3();printf("a...%d\n",a);printf("a...%d\n",f1());printf("a...%d\n",f2());printf("a...%d\n",f3());

}f1(){

a=a+10;return(a);}f2(){

a=a+20;return(a);

}f3(){

a=a+30;return(a);

}


4/29

OUTPUT:

a...39a...49a...69a...99


5/29

PROGARM:

\* transfer structure to a function *\

#includetypedef struct{

char* name;int no;int age;

}record;

void main(){void fun(record *pt);static record std={"LAK",15, 25};printf("%s\t%d\t%d",std.name,std.no,std.age);fun(&std);printf("\n%s\t%d\t%d",std.name,std.no,std.age);

}

void fun(record *pt){pt->name ="MUNI";pt->no =16;pt->age =26;

}


6/29

OUTPUT:

LAK 15 25MUNI 16 26


7/29

PROGRAM:

\* transfer structure to array function *\

#include#define N 3#define Null 0typedef struct{

int sno;char* name;

float age;} record;void main(){

static record std[N]={ {15,"muni", 28},{16,"lak",27},{17,"raja",31}

};

int stdno;record *pt;record *search( record table[], int stdno);printf("student number locater");printf("\n to exit the program enter 0 for student number");printf("\n enter student number : ");scanf("%d",&stdno);while(stdno!=0){

pt = search(std,stdno);if (pt!=NULL){

printf("\n number...%d",pt->sno);printf("\n name...%s",pt->name);printf("\nage...%f",pt->age);


8/29

}else

printf("\n not found..try again");printf("\nenter student number : ");scanf("%d",&stdno);}

}record *search(record table[], int stdno){

int count;for (count=0;count


9/29

OUTPUT:

student number locater to exit the program enter 0 for student number enter student number : 15

number...15name...muni

age...28.000000enter student number : 0


10/29

PROGRAM:

\* swapping of two numbers *\

#includevoid interchange(int *a,int *b);void main(){

int i=5,j=10;printf("\n i and j values before interchange :%d%d",i,j);interchange(&i,&j);

printf("\n i and j value after %d%d",i,j);}void interchange(int *a,int *b){

int t;t=*a;*a=*b;*b=t;

}


11/29

OUTPUT:

i and j values before interchange : 5 10i and j value after 10 5


12/29

PROGRAM:

\* cube of a number using call by value *\

#includeint cube(int x);void main(){

int n;printf("\n enter the number");scanf("%d",&n);

printf("\n");printf("\n cube of %d is..%d",n,cube(n));}int cube(int x){

return(x*x*x);}


13/29

OUTPUT:

enter the number 5cube of 5 is..125


14/29

PROGRAM:

\* factorial without recursion *\

#includevoid main(){

int i,n,fact=1;printf("\n enter the number..");

scanf("%d",&n);for(i=1;i


15/29

OUTPUT:

enter the number..5the factorial of 120


16/29

PROGRAM:

\* factorial using recursion *\

#includemain(){

int a,num;printf("\n enter the number..");scanf("%d",#);a=recur(num);

printf("\n the factorial of the number %d is %d",num,a);}recur(int no){

int fact=1;if(no==1)

return(1);else

fact=no* recur(no-1);return(fact);}


17/29

OUTPUT:

enter the number..5the factorial of the number 5 is 120


18/29


19/29

PROGRAM:

the size of the file is 12the size of file is 0


20/29

PROGRAM:

\* allocated memory *\

#include#includemain(){

char *p;p=(char *)malloc(6);strcpy(p,"MADRAS");

printf("\n memory contains:%s",p);p=(char *)realloc(p,7);strcpy(p,"CHENNAI");

printf("\n memory now contains:%s",p);free(p);

}


21/29

OUTPUT:

memory contains : MADRASmemory now contains : CHENNAI


22/29

PROGRAM:

\* reverse the character *\

#includemain(){

void reverse();printf("\n enter line of text..... ln");

reverse();}

void reverse(){char c;if((c=getchar())!='\n')

reverse();putchar(c);

}


23/29

OUTPUT:

enter line of text..... ln karthik

kihtrak


24/29

PROGRAM:

\* count the number of words using pointer *\

#includemain(){

char str[100],*ps;int word=0,null=0;printf("\n enter a string");ps=str;

gets(ps);while(*ps==32&&ps!=null)ps++;

if(*ps!=null)word++;

for(ps=str;*ps!=null;ps++){

if(*ps!=32&&*(ps-1)==32)word++;

}printf("\n %d words in the given string",word);}


25/29

OUTPUT:

enter a string: how are you

4 words in the given string


26/29

PROGRAM:

\* pointer to structure *\

#includemain(){

struct account{

char name[20];char place[25];int acctno;

};static struct account m4={"venkat","arcot",24201};struct account *ptr;ptr=&m4;printf("%s\t%s\t%d\n",m4.name,m4.place,m4.acctno);

printf("%s\t%s\t%d\n",ptr->name,ptr->place,ptr->acctno);}


27/29

OUTPUT:

venkat arcot 24201venkat arcot 24201


28/29

PROGRAM:

\* sum of numbers using pointers *\

#includemain(){

int b,total=0;int a[5];

int *c;for(b=0;b


29/29

OUTPUT:

enter the number 15

enter the number 25

enter the number 36

enter the number 48

enter the number 54

5

5684

total =28

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fundamental of computing(FOC)