Get suffixes in C - c

Question

I'm trying to get the suffixes of an entered string, but i'm getting the prefixes how can I make to fix it?
The expected result for example with an entry string "Hello" is:
Hello
ello
ell
el
e
Now is returning:
Hello
Hell
Hel
He
H
Thanks
#include <errno.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char **suffix;
void panic(char *m) {
fprintf(stderr, "%s\n", m);
exit(0);
}
int main(int argc, char *argv[]) {
int n, i;
if (argc != 2)
panic("wrong parameters");
n = strlen(argv[1]);
suffix = (char **)malloc(n * sizeof(char *));
if (suffix == NULL)
error("Memoria no disponible");
for (i = 0; i < n; ++i) {
suffix[i] = (char *)malloc((n + 1 - i) * sizeof(char));
if (suffix[i] == NULL)
error("Memoria no disponible");
sprintf(suffix[i], "%s", argv[1]);
argv[1][n - 1 - i] = '\0';
}
for (i = 0; i < n; i++) {
printf("%d %s\n", i, suffix[i]);
}
return 0;
}

Answer 1

Just substitute these two statements
sprintf(suffix[i], "%s", argv[1]);
argv[1][n - 1 - i] = '\0';
for this one statement
sprintf(suffix[i], "%s", argv[1] + i );

Answer 2

Use Vlad from Moscow answer.
Something related you should now, only read argc and argv, never overwrite them. Although in theory you can do this, in practice it's both useless and dangerous.

Answer 3

Should always keep the code/logic as simple as you can.
The following proposed code can be halted with <ctrl-c> and/or EOF
#include <stdio.h>
#include <string.h>
int main( void )
{
char buffer[ 256 ];
// get the string
while( fgets( buffer, sizeof( buffer ), stdin ) )
{
//output string, dropping leading char at each loop iteration
size_t length = strlen( buffer );
for( size_t i=0; i<length; i++ )
{
printf( "%s\n", &buffer[i] );
}
}
}
here is a typical run of the program:
Note: the first line is from the user entering the string.
this is a string
this is a string
his is a string
is is a string
s is a string
is a string
is a string
s a string
a string
a string
string
string
tring
ring
ing
ng
g