comparing portion of string to another string

[Owner]

How do I compare portion of string to another string?

for example

i'd like to do this

char s1[100], s2[100];
int i = strlen(s1);

strcmp(s1[i-3],s2)
^
passing only portion of the string to compare.

 

[Jens Thoms Toerring]

How do I compare portion of string to another string?

for example

i'd like to do this

char s1[100], s2[100];
int i = strlen(s1);

strcmp(s1[i-3],s2)
^
passing only portion of the string to compare.

A bit more of context would be helpful. Perhaps what you
are looking for is

strcmp( s1 + i - 3, s2 );

i.e. you pass a pointer to the 'i-3'th element to strcmp(),
or, written differently,

strcmp( &s1[ i - 3 ], s2 );

For other cases there's also strncmp() where you can tell
how many chars you want to have compared (at most) before
the function decided what to return.

Regards, Jens

 

[Owner]

How do I compare portion of string to another string?

for example

i'd like to do this

char s1[100], s2[100];
int i = strlen(s1);

strcmp(s1[i-3],s2)
^
passing only portion of the string to compare.

A bit more of context would be helpful. Perhaps what you
are looking for is

strcmp( s1 + i - 3, s2 );

i.e. you pass a pointer to the 'i-3'th element to strcmp(),
or, written differently,

strcmp( &s1[ i - 3 ], s2 );

For other cases there's also strncmp() where you can tell
how many chars you want to have compared (at most) before
the function decided what to return.

Regards, Jens

thank you strcmp( &s1[ i - 3 ], s2 ); worked!!