Find permutation .

Write a program for Find permutation.

# include<stdio.h>

int fact(int);

int main()

{

int n,r,P;

scanf("%d %d",&n,&r);

if(n>=r)

    {

    P=fact(n)/fact(n-r);

    printf("%dP%d=%d",n,r,P);

    return 0;

    }

}

int fact(int n)

    {

        int i,f=1;

    for(i=1;i<=n;i++)

    f=f*i;

        return (f);

    }

From: Me

Find factorial (Program)

Write a program for find factorial.

# include<stdio.h>

int main()

long fact(long);

{

int number;

scanf("%d",&number);

printf("Fact: %ld",fact(number));

return 0;

}

long fact(long number)

    {

    long factorial=1;

    for(i=number;i>=1;i--)

    factorial=factorial*i;

    return (factorial);

    }

From: Me

Convert integer to roman digit (Program)

Write a program for convert integer to roman digit.

# include<stdio.h>
int main()
{
int number;
scanf("%d",&number);
while(number>=1000)
    {
    printf("M");
    number-=1000;
    }
while(number>=500)
    {
    printf("D");
    number-=500;
    }
while(number>=100)
    {
    printf("C");
    number-=100;
    }
while(number>=50)
    {
    printf("L");
    number-=50;
    }
while(number>=10)
    {
    printf("X");
    number-=10;
    }
while(number>=5)
    {
    printf("M");
    number-=5;
    }
switch(number)
    {
    case 0:
        break;
    case 1: printf("I");
    break;
    case 2: printf("II");
    break;
    case 3: printf("III");
    break;
    case 4: printf("IV");
    break;
    }
return 0;
}


From: Me 

Find fibonacci number (Program)

Write a proaram for  Find fibonacci number.

# include<stdio.h>

int main()

{

int n,i,f0=0,f1=1,f;

scanf("%d",&n);

for(i=1;i<=n;i++)

    {

    f=f0+f1;

    printf("%4d",f0);

    f1=f0;

    f0=f;

    }

return 0;

}

From: Me