뇌 마음 반반저장소

3-7. strnstr strnstr이란? strnstr - locate a substring in a string 문자열에서 부분 문자열을 찾기. The strnstr function locates the first occurrence of the null-terminated string little in the string big , where not more than len characters are searched. Characters that appear after a `\0' character are not searched. Since the strnstr function is a specific API, it should only be used when portability is not a ..