This program reads the current system time and displays it in the form HH:MM:SS
#include <stdio.h>
#include <dos.h>
int main(void)
{
struct time t;
gettime(&t);
printf(“The current time is: %2d:%02d:%02d\n”, t.ti_hour, t.ti_min, t.ti_sec);
return 0;
}

This is a simple program to generate random numbers. This logic can be used to build a Lotto program or a program to pick Lucky number and so on. Here’s the program
#include<stdio.h>
#include <stdlib.h>
#include <time.h>
int main(void)
{
int …

This is a simple login program in C. While accepting password it masks each character using ‘*’ symbol and display the password in the next line after the user hits Enter key. It also accepts …

This program is an example of how to create a virus in C. This program demonstrates a simple virus program which upon execution (Running) creates a copy of itself in the other file. Thus it …

This C program generates the numbers in pyramid pattern. It takes the input from two through nine and generates the numbers in the pyramid pattern. For example if the input is 4 then the program …

The following C program print’s the entered number in words. For example if the number entered is 12345 then the program prints the entered number in words as One Two Three Four Five

 
#include<stdio.h>
void main()
{
int i=0;
unsigned …

This program displays the number of digits present in the number that is entered through the input.
#include<stdio.h>
#include<conio.h>
void main()
{
unsigned long int num;
int i=0;
clrscr();
printf(“Enter the digit\n”);
scanf(“%lu”,&num);
while(num!=0)
{
num=num/10;
++i;
}
printf(“Length=%d”,i);
getch();
}

This program can be used to print a string without using any output statements such as printf, puts etc. However this program only works in 16-bit mode since it directly writes to VDU Memory

#include<stdio.h>
#include<conio.h>
char str[]=”Hello …

This program can be used to print character without using any output statements. This program only works in 16-bit mode since it directly writes to VDU Memory.
 
 
#include<stdio.h>
#include<conio.h>
void main()
{
char far *p=(char far *)0xb8000000;
*p=’A’;
getch();
}

This program accepts any valid C Program as an input and removes the comments and blanks from it. The output is a program that has no comments and blank lines.

#include<stdio.h>
#include<conio.h>
#include<process.h>
#include<dos.h>
void main()
{
FILE *a,*b;
char fname[20],ch,tch=NULL,tch1=NULL;
int flag1=0,flag=0,count=0,count1=0,count2=0;
clrscr();
printf(“Enter the …

Here is a C program to print it’s own source code. That is the output of this program is exactly same as it’s source code. Here’s the program

#include<stdio.h>
char *program=”#include<stdio.h>%cchar *program=%c%s%c;%cvoid main()%c{%cprintf(program,10,34,program,34,10, 10,10,10);%c}”;
void main()
{
printf(program,10,34,program,34,10,10,10,10);
}