View Code of Problem 52

 #include<iostream>
     
    using namespace std;
     
    int main(){
	char a[100];
	gets(a);
	for(int i=strlen(a)-1;i>=0;--i)
		cout<<a[i];
    	return 0;
    } 
/*
Main.cc: In function 'int main()':
Main.cc:8:8: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(a);
        ^
In file included from /usr/include/c++/8/cstdio:42,
                 from /usr/include/c++/8/ext/string_conversions.h:43,
                 from /usr/include/c++/8/bits/basic_string.h:6400,
                 from /usr/include/c++/8/string:52,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from Main.cc:2:
/usr/include/stdio.h:583:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
Main.cc:8:8: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(a);
        ^
In file included from /usr/include/c++/8/cstdio:42,
                 from /usr/include/c++/8/ext/string_conversions.h:43,
                 from /usr/include/c++/8/bits/basic_string.h:6400,
                 from /usr/include/c++/8/string:52,
                 from /usr/include/c++/8/bits/locale_classes.h:40,
                 from /usr/include/c++/8/bits/ios_base.h:41,
                 from /usr/include/c++/8/ios:42,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from Main.cc:2:
/usr/include/stdio.h:583:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
Main.cc:9:12: error: 'strlen' was not declared in this scope
  for(int i=strlen(a)-1;i>=0;--i)
            ^~~~~~
Main.cc:9:12: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
Main.cc:3:1:
+#include <cstring>
 
Main.cc:9:12:
  for(int i=strlen(a)-1;i>=0;--i)
            ^~~~~~
*/