//No of Args
#include
void main()
{
int n,a,b,c;
printf("ENter the 3 nos");
n=scanf("%d%d%d",&a,&b,&c);
printf("No of Args:%d",n);
getch();
}
//Ex2 No of Args
#include
#include
int main()
{
int n,a,b,c;
clrscr();
printf("ENter the 3 nos");
n=scanf("%d%d%d",&a,&b,&c);
printf("No of Args:%d",n);
n=printf(printf("First second"););
printf("No of Args:%d",n);
getch();
return 0;
}

//Digit sum(145),1+4+5=10=1+0=1;
#include
#include
void main()
{
int n;
clrscr();
printf("Enter your no");
scanf("%d",&n);
n=n%9;
if(n!=0)
{
printf("the digit sum is %d",n);
}
else
{
printf("the digit sum is %d",9);
}
}
//Input formatting
#include
#include

void main()
{
float x = 12.34567; /* The keyword `float' declares the number x
to be a real number. */
clrscr();

printf("%f\n", x);
printf("%8.5f\n", x);
printf("%8.3f\n", x);
printf("%-8.3f\n", x);
printf("%9.2e\n", x); /* printing real number in exponential form */
printf("%12.4e\n", x);
printf("%5e\n", x);
printf("%8.3f\n", -x);

getch();
}
#include
#include
int main()
{
int n,f;
clrscr();
printf("Enter the NO:");
scanf("%d",&n);
f=fact(&n);
printf("factorial of given is:%d",f);
getch();
return 0;
}
int fact(int *n)
{
int fact=1,i;
if(*n==0||*n==1)
return 1;
else
{
for(i=1;i<=*n;i++)
{
fact=fact*i;
}
return fact;
}

}
//summation
#include
#include
int main()
{
int n,f;
clrscr();
printf("Enter the NO:");
scanf("%d",&n);
f=sum(&n);
printf("summation of given is:%d",f);
getch();
return 0;
}
int sum(int *n)
{
int sum=0,i;
/*
if(*n==0||*n==1)
return 1;
else
*/
{
for(i=0;i<=*n;i++)
{
sum=sum+i;
}
return sum;
}

}
//swapping
#include
void main()
{
int a,b;
printf("welcome TO swap\nEnter your two nos:\n");
scanf("%d%d",&a,&b);
swap(a,b);
swap(&a,&b);
printf("The swappwe3d nos:%d%d",a,b);
swapt(&a,&b);
printf("The swappwe3d nos:%d%d",a,b);
swapBit(&a,&b);
printf("The swappwe3d nos:%d%d",a,b);
printf("The swappwe3d nos:%d%d",a,b);
swap1(a,b);
getch();
}
//call by value
int swap(int x,int y)
{
int t;
t=x;
x=y;
y=t;
printf("The swappwe3d nos:%d%d",x,y);
}
//call by value
int swap1(int x,int y)
{
x=(x+y)-(y=x);
printf("The swappwed nos:%d%d",x,y);
}
//call by Ref
int swap(int *x,int *y)
{
int t;
t=*x;
*x=*y;
*y=t;

}
int swapt(int *x,int *y)
{
//int t;
*x=*x+*y;
*y=*x-*y;
*x=*x-*y;

}
int swapBit(int *x,int *y)
{
//int t;
*x=*x+*y;
*y=*x-*y;
*x=*x-*y;

}
//text compresion
#include
#include
void main()
{
FILE *fp,*fd;
char a,b;
int i=1,j;
clrscr();
gotoxy(10,15);
fp=fopen("intxt.txt","r");
fd=fopen("outtxt.txt","w");
fscanf(fp,"%c",&b);
while(!feof(fp))
{
fscanf(fp,"%c",&a);
if(b==a)
{
i++;
}
else
{
if(i>=2)
{
printf("@");
fprintf(fd,"@");
printf("%c%d",b,i);
i=1;
}
else
{
for(j=0;j2)
{
printf("@");
fprintf(fd,"%c",a);
i=0;
}
getch();
}