Strange behaviour strstr() function

Hi, I use RealView MDK-ARM 3.15b. When I call tge strstr function to search a substring in a larger string it always return NULL. This is my code char* ptr; char str1[80] ; char str2[80];...
Why no "strstr" function?

There is no "strstr" function in Keil <stdlib.h>, why? Can you give me a source code of "strstr" with C level? Thanks.
Why no "strstr" function?

There is no "strstr" function in Keil <stdlib.h>, why? Can you give me a source code of "strstr" with C level? Thanks.
Strange behaviour strstr() function

Hi, I use RealView MDK-ARM 3.15b. When I call tge strstr function to search a substring in a larger string it always return NULL. This is my code char* ptr; char str1[80] ; char str2[80];...
strpos() not working when strstr() works

Dear Board I’m using STM32F103 controller, when I use strstr function for finding a word in a string the compiler throws a warning. No issue for me but the code works fine But when I use strops...