program to know a number is positive or negative or zero using function.

using codeblock
---------------------------------


//program to know a number is positive or negative or zero using function.
#include<stdio.h>                      //header file
void number();                          // function prototype/declaration with return type zero.
int main()                              //main function
{
number();                                     // function calling.
return 0;                                       //returns 0 value
}
void number()                              // function body line ; also called function definition
{
 int number;                    // variable declaration 
printf("enter number\n");           // displays message to input data
scanf("%d",&number);        // gets data from user.
if(number>0)                     //condition testing
{
printf("%d is positive\n",number);    // displays output
}

else if(number<0)                     //second condition testing
{
   printf("%d is negative\n",number); 
}
else                                   // if none of above condition satisfy
{
    printf("%d is zero\n",number);      //output
}
}


------------------------------------------------------------------------------------------
using turboc++
----------------------------------------------------------------------------------------------
//program to know a number is positive or negative or zero using function.
#include<stdio.h>                      //header file
#include<conio.h>
void number();                          // function prototype/declaration with return type zero.
void main()                              //main function
{
number();                                     // function calling.
getch();                                       //holds the output
}
void number()                              // function body line ; also called function definition
{
 int number;                    // variable declaration 
printf("enter number\n");           // displays message to input data
scanf("%d",&number);        // gets data from user.
if(number>0)                     //condition testing
{
printf("%d is positive\n",number);    // displays output
}

else if(number<0)                     //second condition testing
{
   printf("%d is negative\n",number); 
}
else                                   // if none of above condition satisfy
{
    printf("%d is zero\n",number);      //output
}
}

to know a number is even or odd using function.

using codeblocks
----------------------------------------------------------------------------------------------------
//to know a number is even or odd using function.
#include<stdio.h>                      //header file
void evenodd();                          // function prototype/declaration with return type zero.
int main()                              //main function
{
evenodd();                                     // function calling.
return 0;                                       //returns 0 value
}
void evenodd()                              // function body line ; also called function definition
{
 int number;                    // variable declaration 
printf("enter number\n");           // displays message to input data
scanf("%d",&number);        // gets data from user.
if(number%2==0)                     //condition testing
{
printf("%f is even\n",number);    // displays output
}

else
{
   printf("%d is odd\n",number); //displays output
}
}



---------------------------------------------------------------------------------------

using turbo c++
----------------------------------------------------------------------------
//to know a number is even or odd using function.
#include<stdio.h>                      //header file
#include<conio.h>
void evenodd();                          // function prototype/declaration with return type zero.
void main()                              //main function
{
evenodd();                                     // function calling.
getch();                                       //returns 0 value
}
void evenodd()                              // function body line ; also called function definition
{
 int number;                    // variable declaration 
printf("enter number\n");           // displays message to input data
scanf("%d",&number);        // gets data from user.
if(number%2==0)                     //condition testing
{
printf("%f is even\n",number);    // displays output
}

else
{
   printf("%d is odd\n",number); //displays output
}
}

function related programs with types

function related programs with types


click below to see programs:
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 FUNCTION WITH NO ARGUMENTS AND NO RETURN VALUES.

FUNCTION WITH NO ARGUMENTS AND  RETURNING SOME VALUES.

FUNCTION WITH  ARGUMENTS AND  RETURNING NO VALUES.

FUNCTION WITH  ARGUMENTS AND  RETURN VALUES.

Recursive function:

storage concept/classes:-

program to print smallest number among three numbers using function.

using codeblock
--------------------------------------------------------------------------------------------------------------------
//to print smallest number among three numbers using function.
#include<stdio.h>                      //header file
void smallest();                          // function prototype/declaration with return type zero.
int main()                              //main function
{
smallest();                                     // function calling.
return 0;                                       //returns 0 value
}
void smallest()                              // function body line ; also called function definition
{
 float number1,number2,number3;                    // variable declaration 
printf("enter three numbers\n");           // displays message to input data
scanf("%f%f%f",&number1,&number2,&number3);        // gets data from user.
if(number1>number2 &&number1>number3)                     //condition testing
{
printf("%f is greater\n",number1);    // displays output
}
else if(number2>number1 &&number2>number3)
{
    printf("%f is greater\n",number2);    // displays output for second condition
}
else
{
   printf("%f is greater\n",number3); 
}

}

--------------------------------------------------------------------------------------------------------------------------
using turbo C++
-----------------------------------------------------------------

//to print smallest number among three numbers using function.
#include<stdio.h>                      //header file
#include<conio.h>
void smallest();                          // function prototype/declaration with return type zero.
void main()                              //main function
{
smallest();                                     // function calling.
getch();                                       //returns 0 value
}
void smallest()                              // function body line ; also called function definition
{
 float number1,number2,number3;                    // variable declaration 
printf("enter three numbers\n");           // displays message to input data
scanf("%f%f%f",&number1,&number2,&number3);        // gets data from user.
if(number1>number2 &&number1>number3)                     //condition testing
{
printf("%f is greater\n",number1);    // displays output
}
else if(number2>number1 &&number2>number3)
{
    printf("%f is greater\n",number2);    // displays output for second condition
}
else
{
   printf("%f is greater\n",number3); 
}

}

program to get greatest number between two numbers

using codeblocks
-------------------------------------------------------

// program to get greatest number between two numbers
#include<stdio.h>                      //header file
void greater();                          // function prototype/declaration with return type zero.
int main()                              //main function
{
greater();                                     // function calling.
return 0;                                       //returns 0 value
}
void greater()                              // function body line ; also called function definition
{
 float number1,number2;                    // variable declaration
printf("enter two numbers\n");           // displays message to input data
scanf("%f%f",&number1,&number2);        // gets data from user.
if(number1>number2)                     //condition testing
{
printf("%f is greater\n",number1);    // displays output
}
else
{
    printf("%f is greater\n",number2);    // displays output if the condition did not satisfy
}
}

/* here we have used top down approach. i.e calling from top and writing its body line down.
 we can also reverse the process.*/


-------------------------------------------------------------------------
using turbo C++
---------------
//program to get greatest number between two numbers
#include<stdio.h>                      //header file
#include<conio.h>
void greater();                          // function prototype/declaration with return type zero.
void main()                                //main function
{
greater();                                     // function calling.
getch();                                       //holds the output on screen
}
void greater()                              // function body line ; also called function definition
{
 float number1,number2;                    // variable declaration
printf("enter two numbers\n");           // displays message to input data
scanf("%f%f",&number1,&number2);        // gets data from user.
if(number1>number2)                     //condition testing
{
printf("%f is greater\n",number1);    // displays output
}
else
{
    printf("%f is greater\n",number2);    // displays output if the condition did not satisfy
}
}

program to draw a rectangle.

//drawing rectangle
#include<stdio.h>
#include<conio.h>
#include<graphics.h>
void main()
{
clrscr();
int gdriver, gmode;    //variables declaration
gdriver=DETECT;        // detection of graphics driver

initgraph(&gdriver, &gmode, "c:\\tc\\BGI");
       /* initialize graphics and local variables with path in TC folder*/
       /* gmode is for graphics mode you want to work. */
rectangle(20,20,200,200);//(left,top) is the upper left corner of the
//rectangle, and (right,bottom) is its lower
//right corner.
//left is for x coordianate value and top is for
// y coordinate value . similarly right and bottom
// are for x and y coordinates res.
//give bigger value for all.
getch();          //gets one character from user and closes the graphics.
closegraph();     //closes graphics.h
}

program to draw a circle

//drawing circle
#include<stdio.h>
#include<conio.h>
#include<graphics.h>
void main()
{
clrscr();
int gdriver, gmode;    //variables declaration
gdriver=DETECT;        // detection of graphics driver

initgraph(&gdriver, &gmode, "c:\\tc\\BGI");
       /* initialize graphics and local variables with path in TC folder*/
       /* gmode is for graphics mode you want to work. */
circle(40,40,30);  // circle with starting and ending angle (coordinate value for x and y of screen)
  //where you want to display circle;for x and y res.
  //last argument is radius.
getch();          //gets one character from user and closes the graphics.
closegraph();     //closes graphics.h
}