20 contoh program function (L/C)

Program 1 :

Code :

#include <stdio.h>

#include <conio.h>

int kali(int a,int b, int c)

{

int x;

x = a * b * c;

return(x);

}

int main()

{

int a,b,c;

printf("Masukkan angka 1 : ");

scanf("%d",&a);

printf("Masukkan angka 2 : ");

scanf("%d",&b);

printf("Masukkan angka 3 : ");

scanf("%d",&c);

printf("Hasil perkalian ketiga bilangan adalah %d",kali(a,b,c)); //parameter aktual

getch();

return(0);

}

Output:

 

Program 2 :

Code :

#include <stdio.h>

#include <conio.h>

void desc_sort(int *bil1,int *bil2) //parameter formal

{

if(*bil1<*bil2)

{

*bil1 = *bil1 + *bil2;

*bil2 = *bil1 - *bil2;

*bil1 = *bil1 - *bil2;

}

}

int main()

{

int a,b,c;

printf("Masukkan angka 1 : ");

scanf("%d",&a);

printf("Masukkan angka 2 : ");

scanf("%d",&b);

printf("Masukkan angka 3 : ");

scanf("%d",&c);

desc_sort(&a,&b); //parameter aktual

desc_sort(&a,&c); //parameter aktual

desc_sort(&b,&c); //parameter aktual

printf("Hasil descending sort adalah %2d %2d %2d",a,b,c);

getch();

return(0);

}

Output:

Program 3 :

Code :

# include <stdio.h>

# include <conio.h>

void perkalian (int a, int b, int c)

{

a= a*2 ; b= b*2 ; c= c * 2 ;

}

int main ( )

{

int x = 1, y = 3, z = 7 ;

perkalian ( x, y, z ) ;

printf (" X = %d  Y = %d Z = %d",x,y,z);

getch();

return 0 ;

}

Output:

Program 4 :

Code :

#include <stdio.h>

#include "conio.h"

int div(int num, int value);

int main()

{

            int x;

            printf("Enter a value for its divisors: ");

            scanf("%d",&x);

            div(x,x);

            getch();

            return 0;

}

int div(int num, int value)

{           if ( (num>=1) && (value%num==0) )

            printf("%d ",num);

            num=num-1;

           

            if (num==0) return 0;

            else return div(num,value);

            getch();

            return 0;

}

Output:

Program 5 :

Code :

#include <stdio.h>

#include <conio.h>

double Absolut(double X); /*deklarsi fungsi Absolut */

void main()

{

float Nilai;

Nilai = -123,45;

printf("%7.2f nilai mutlaknya adalah %7.2f\n",Nilai,Absolut(Nilai));

getch();

}

/*----- Fungsi untuk memutlakkan nilai negatip- -----*/

double Absolut(double X) /* definisi fungsi */

{

if(X<0) X = -X;

return(X);

}

Output:

Program 6 :

Code :

#include <stdio.h>

#include <conio.h>

int faktorial (int N); /*prototype fungsi factorial*/

void main()

{

int N;

int fak;

printf ("berapa factorial ? ");scanf("%d",&N);

fak = faktorial(N);

printf("%d factorial = %d\n",N,fak);

getch();

}

/*-----fungsi untuk menghitung nilai N factorial -----*/

int faktorial(int N) /*definisi fungsi*/

{

int I;

int F=1;

if(N<=0)

return(0);

for(I=2;I<=N;I++) F *= I;

return}

Output:

Program 7 :

Code :

#include <stdio.h>

#include <conio.h>

int TAMBAH(int A,int B);

int main(){

int hasil;

hasil = TAMBAH(2,3);

printf("Hasil = %d",hasil);

getch();

}

int TAMBAH(int A,int B){

int C;

C = A + B;

{

float C;

C = 100;

}

return(C);

}

Output:

Program 8 :

Code :

#include <stdio.h>

#include <conio.h>

int d=3,e=1;

void coba_lokal(int a,int b){

int c = 0;

int d = 10;

int e;

e = (a+b) * (c+d);

printf("lokal a = %d\n",a);

printf("lokal b = %d\n",b);

printf("lokal c = %d\n",c);

printf("lokal d = %d\n",d);

printf("lokal e = %d\n",e);

}

void main(){

int a=2;

int b;

b = 4;

int c=0;

printf("global a = %d\n",a);

printf("global b = %d\n",b);

coba_lokal(a,b);

printf("main c = %d\n",c);

printf("global d = %d\n",d);

printf("global e = %d\n",e);

getch();

}

Output:

’

Program 9 :

Code :

#include <stdio.h>

#include <conio.h>

int c = 4;

int m = 3;

void lokal(){

int a = 5;

int b = a + 2;

printf("lokal a = %d\n",a);

printf("lokal b = %d\n",b);

//karena tidak ada c, maka ambil global

printf("global c = %d\n",c);

}

void main(){

int a = 1;

int b = 2;

int c = 3;

lokal();

printf("main a = %d\n",a);

printf("main b = %d\n",b);

//walaupun global c ada tapi c yang digunakan yang di main

printf("main c = %d\n",c);

//karena tidak ada m, maka ambil global

printf("global m = %d\n",m);

getch();

}

Output:

Program 10 :

Code :

#include <stdio.h>

#include <conio.h>

void coba_static(int a){

static int b=3;

int c=1;

printf("b awal : %d\n",b);

b += a;

printf("b akhir : %d\n",b);

printf("c awal : %d\n",c);

c += a;

printf("c akhir : %d\n",c);

}

void main(){

int a=2;

coba_static(a);

a=3;

coba_static(a);

getch();

}

Output:

Program 11 :

Code :

#include <stdio.h>

#include <conio.h>

void tukar (int *px, int *py);

main()

{

     int a,b;

     a = 88;

     b = 77;

     printf("Nilai sebelum pemanggilan fungsi\n");

     printf("a = %d b = %d\n\n",a,b);

     tukar(&a,&b); /* parameter alamat a dan alamat b */

     printf("Nilai sesudah pemanggilan fungsi\n");

     printf("a = %d b = %d\n\n",a,b);

}

void tukar (int *px, int *py)

{

     int z;

     z = *px;

     *px = *py;

     *py = z;

     printf("Nilai diakhir fungsi tukar()\n");

     printf("*px = %d *py = %d\n\n",*px,*py);

     getch();

}

Output:

Program 12 :

Code :

#include <stdio.h>

#include <conio.h>

            void tukar (int x, int  y);

            main()

            {

                        int a,b;

                        a = 88;

                        b = 77;

           

                        printf("Nilai sebelum pemanggilan fungsi\n");

                        printf("a = %d b = %d\n\n",a,b);

                        tukar(a,b);

                        printf("Nilai sesudah pemanggilan fungsi\n");

                        printf("a = %d b = %d\n\n",a,b);

            }

           

            void tukar (int x, int y)

            {

                        int z;   

                        z = x;

                        x = y;

                        y = z;

                        printf("Nilai diakhir fungsi tukar()\n");

                        printf("x = %d y = %d\n\n",x,y);

     getch ();

     }

Output:

Program 13 :

Code :

#include<stdio.h>

#include<conio.h>

void myFunction();

int add(int a, int b);

int main()

{

            myFunction();

            printf("\n\n%d",add(10,15));

            getch();

}

void myFunction()

{

            printf("This is inside function :D");

}

int add(int a, int b)

{

            return a+b;

}

Output:

Program 14 :

Code :

#include<stdio.h>

#include<conio.h>

void add(int x,int y)

{

int result;

result = x+y;

printf("Sum of %d and %d is %d.\n\n",x,y,result);

}

int main()

{

add(10,15);

add(55,64);

add(168,325);

getch();

}

Output:

Program 15 :

Code :

#include <stdio.h>

#include <conio.h>

float arit_midd( float a, float b, float c ){

  float ar;

  ar = (a + b + c) / 3;

  return ar;

}

int main(void) {

   float x, y, z, midd;

   printf("\nInput Tiga angka : ");

   scanf("%f %f %f", &x, &y, &z );

   midd = arit_midd(x,y,z);

   printf("\nRata- Ratanya : %f", midd);

getch ();

}

Output:

Program 16 :

Code :

#include <stdio.h>

#include <conio.h>

int twotimes(int x){

   printf ("\nF:Argument before change took place %d",x);

   x *= 2;

   printf ("\nF:Argument after tempering with it %d",x);

   return x;

}

int main(void) {

   int number=10;

   printf ("\nM:Number before function-call %d",number);

   twotimes(number);

   printf("\nM:Number after function-call %d",number);

getch();

}

Output:

Program 17 :

Code :

#include <stdio.h>

#include <conio.h>

int number(int n)

{

      return n;

}

void main()

{

      int number(int);

      int a = number(4);

      clrscr();

      printf("\n Number is : %d",a);

      getch();

}

Output:

Program 18 :

Code :

#include <stdio.h>

#include <conio.h>

void printno(int a)

{

      printf("\n Number is : %d", a);

}

void main()

{

      int no;

      void printno(int);

      clrscr();

      printf("\n Enter Number : ");

      scanf("%d", &no);

      printno(no);

      getch();

Output:

Program 19:

Code :

#include <stdio.h>

#include <conio.h>

Recursion()

{

            int no;

            printf("\nRecursion... ");

            printf("\n\n Enter Number : ");

            scanf("%d",&no);

            if (no==3)

                        exit(0);

            else

                        Recursion();

}

int main()

{

            Recursion();

}

Output:

Program 20 :

Code :

#include <stdio.h>

#include <stdlib.h>

void func(int);

main(){

      void (*fp)(int);

      fp = func;

      (*fp)(1);

      fp(2);

      exit(EXIT_SUCCESS);

}

void

func(int arg){

      printf("%d\n", arg);

}

Output: