C program to find substring in string

Publié le: 13 juillet 2024
sur la chaîne: CodeTime

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sure! here is a tutorial on how to write a c program to find a substring in a string:

1. **include necessary header files**: we need to include the standard input-output header file `stdio.h` for input and output operations.

2. **declare the main function**: the `main` function is the entry point of a c program.

3. **declare necessary variables**: declare variables to store the main string, the substring to be searched, and other necessary variables.

4. **prompt user for input**: ask the user to enter the main string and the substring to be searched.

5. **use the strstr function**: the `strstr` function in c can be used to find the first occurrence of a substring in a given string. it returns a pointer to the first occurrence of the substring in the main string.

6. **check the result**: if the `strstr` function returns a non-null value, then the substring is found in the main string.

7. **print the result**: print a message indicating whether the substring was found or not.

here is the code example:

in this code example, we use the `strstr` function to find the substring `substring` in the main string `mainstring`. the program then prints a message based on whether the substring is found in the main string or not.

i hope this tutorial helps you understand how to write a c program to find a substring in a string. let me know if you have any questions or need further clarification!

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