c - strstr and occurrences to match -

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i have several possible occurrences test strstr.

if ((a = strstr(string, "foo")) != null || (a = strstr(string, "bar")) != null ||     (a = strstr(string, "foo2")) != null ||(a = strstr(string, "bar2")) != null ||     (a = strstr(string, "foo3")) != null ||(a = strstr(string, "bar3")) != null) //

and based on occurrence found need 

 var = strlen("the_one_matched_above");

what way without using lots of if statements?

are willing use comma operator:

if ((lookfor = "foo", = strstr(string, lookfor)) != null ||     (lookfor = "bar", = strstr(string, lookfor)) != null ||     ...) {     var = strlen(lookfor); }

the comma operator allow evaluate multiple expression in left right order. value of expression whole value of rightmost esub-expression.


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