C in 7 days - Apply a function to the elements of a table

6

Apply a function to the elements of a table

#include <stdio.h>
int inc( int *n ) {
return ++*n;
}
int dec( int *n ) {
return --*n;
}
void apply( int (*f)( int * ), int tab[], int siz ) {
int *p;
for( p = tab; p < tab+siz; p++ )
f( p );
}
main() {
int i;
int tab[ 10 ];
for ( i = 0; i < 10; i++ )
tab[ i ] = i;
for ( i = 0; i < 10; i++ )
printf("%d\n", tab[ i ]);
apply( inc, tab, 10 );
printf("\n");
for ( i = 0; i < 10; i++ )
printf("%d\n", tab[ i ]);
apply( dec, tab, 10 );
printf("\n");
for ( i = 0; i < 10; i++ )
printf("%d\n", tab[ i ]);
}

$ gcc -o apply apply.c
$ ./apply
0
1
2
...

1
2
3
...

0
1
2
...

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