C Reverse String Strrev

Example


#include<stdio.h>

#include <string.h>  

int main(){  

  char str[20];  

  printf("Enter string: ");  

  gets(str);//reads string from console  

  printf("String is: %s",str);  

  printf("\nReverse String is: %s",strrev(str));  

 return 0;  

}

Output


Enter string: logic practice

String is: logic practice

Reverse String is: hcettinopt

Explanation:

The given C code takes a string as input, employs the strrev function to invert it, and displays both the original and reversed texts. By applying the strrev function, the phrase "logic practice" is transformed into "tnioptavaj".

Let's talk about the drawbacks of strrev and why it is not advised:

There are various drawbacks of the strrev function . Some main drawbacks are as follows:

✅ Security Risks: It is inherently dangerous because the strrev method changes the original string in place. If the target buffer is not big enough to accommodate the reversed string, it might result in buffer overflows . Attackers may use buffer overflows to run malicious code, potentially resulting in security flaws.
✅ Lack of Standard Library Support: Since strrev is not supported by the C standard library, its behavior may change between systems and compilers. As a result, code that uses strrev might not run on different platforms.
✅ Strrev Is Not a Safe Replacement for strdup: Some programmers could try to use strrev in place of the string duplication method strdup. Strrev alters the old string; it does not produce a new reversed string . Therefore, it is not a reliable alternative to strdup .
✅ Strrev is not a standard function, as was previously indicated, and current C programming conventions encourage the use of safer and more dependable alternatives.

If you aim to invert a string in C without relying on strrev, consider exploring the following substitute methods:

Utilizing a Loop: To iterate through the string until reaching its midpoint, you can employ a loop to swap characters from the start with those from the end.

Utilizing a Temporary Array: To generate a reversed string, you can duplicate the characters from the initial string into a temporary array in reverse order and subsequently add a null terminator at the end.

By leveraging Standard Library functions in C++, you can efficiently invert a string by employing the std::string along with std::reverse functions.

Using the strrev function in C is discouraged for string manipulation as it comes with various limitations and potential risks, despite being widely used by programmers to reverse strings. This function is non-portable as it is not included in the C standard library, and its unsafe nature can lead to buffer overflows and the exposure of security vulnerabilities within the code.

In contemporary C programming conventions, it is advised against utilizing strrev due to its potential risks. The current emphasis is on secure and reliable methods for manipulating strings. Programmers are encouraged to opt for alternative techniques like iterating through the string and exchanging characters using loops, or storing the reversed content temporarily in an array.

Programmers can enhance the robustness of their code against potential vulnerabilities and ensure its consistent execution on various platforms and compilers through the adoption of more secure methodologies.

The string manipulation functions in the standard library, like std::string and std::reverse, offer a secure and intuitive approach for reversing strings, making them accessible to C++ programmers.

In summary, refraining from utilizing strrev and adopting more secure methods for reversing strings aligns with modern programming standards and enhances the reliability, security, and maintainability of C code.

Example

Let's talk about the drawbacks of strrev and why it is not advised:

Input Required