Frequently asked C programs

Some Basics C program frequently asked in interviews

1.Find factorial of a number using recursive function.

#include<stdio.h>

#include<conio.h>

int fact(int);

void main()

{

int a,b;

printf("Enter no.");

scanf("%d",&a);

clrscr();

b=fact(a);

printf("%d",b);

getch();

}

int fact(int x)

{

int r=1;

if(x==1) return 1;

else r=x*fact(x-1);

return r;

}

2. Getting a multiple word string having spaces from user using scanf function.

#include<stdio.h>

#include<conio.h>

void main()

{

char name[20];

printf("Enter name:\n");

scanf("%[^\n]s",&name);              /* notice the format specifier used here i.e 

%[^\n]s

*/

printf("%s",name);                          

getch();

}