how to replace a substring in a string using C? - C / C++ We can declare string in two ways: By char array. The time complexity of this solution is O (m.n) where m and n are the length of String X and Y . By string literal. C. The keyword class can be interchangable with typename in this case. C Program to Reverse String Without Using Library Function - String ... ( you can generate all the sub string by recursion or iteration both) 2. check the occurrence of the the sub string in the string, If the string occur more then once print it ( for matching sub string many algorithm ava. The strlen () function returns the length of a function. Example: strchr () function in C. In this example, we have a string and we are searching a character 'u' in the string using strchr () function. then bet that you can write strstr without using any local variables or calling any other external routines. Process returned 0. Write an efficient function to implement strcpy () function in C. The standard strcpy () function copies a given C-string to another string. c - How to implement strstr() without casting away const? - Stack Overflow C strstr() function - javatpoint The concept of pointers is used by getline (). C - strrchr () example. Here you will get C and C++ program to find substring in string. Program is explained in detail. Strlwr in C Programming - Tutorial Gateway We need to verify it before we have confidences to use it. The getline method reads a full line from a stream, such as a newline character. It has two arguments as char strings. c++ - strstr implementation - Code Review Stack Exchange Here is the complete source code that has own functions find_length (like strlen) to find the length, join_strings( like strcat) for joining strings, compare_strings(like strcmp) for comparing two . If it founds substring in the base string . In my opinion if you know a clever versions exists is enough (because in real life I would Google "efficient strstr implementation") if you happen to know the name even . C program to find length of string without using string function(strlen).Example,if string="Code" then length=4.Logic,Dry Run&O/p of program is also given. is header in the C standard library for the C language which help us for handling string functions and memory functions. C strstr() Function - C tutorial - BeginnersBook