fungsi mantan balikan bahasa C

CARA 1

#include <stdio.h>

int tambah(int x,int y);

int main()

{

int a,b,total;

printf("masukan bilangan pertama=");

scanf("%i",&a);

printf("masukan bilangan pertama2=");

scanf("%i",&b);

//total=tambah(a,b);

printf("totall= %i",tambah(a,b));

return 0;

}

int tambah(int x,int y)

{

int z;

z=x+y;

return z;

}

==================================

CARA 2

#include <stdio.h>

int tambah(int x,int y);

int main()

{

int a,b,total;

printf("masukan bilangan pertama=");

scanf("%i",&a);

printf("masukan bilangan pertama2=");

scanf("%i",&b);

total=tambah(a,b);

printf("totall= %i",total);

return 0;

}

int tambah(int x,int y)

{

int z;

z=x+y;

return z;

}

=========================

#include <stdio.h>

int tambah(int x,int y);

int main()

{

int a,b;

printf("masukan bilangan pertama=");

scanf("%i",&a);

printf("masukan bilangan pertama2=");

scanf("%i",&b);

    tambah(a,b);

return 0;

}

int tambah(int x,int y)

{

int z;

z=x+y;

printf("totall= %i",z);

return z;

}

=============================================

gak usah balikan =kosong void

#include<stdio.h>

void sayhello();

main()

{

sayhello();

}

//fungsi tanpa nilai balik

void sayhello()

{

printf("hello programmer");

}