运行 ID: 128835

Main.cc:2:11: error: ‘::main’ must return ‘int’
 void main(){
           ^
Main.cc: In function ‘int main()’:
Main.cc:4:7: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations]
 gets(s);n=strlen(s);
       ^
In file included from /usr/include/stdio.h:862:0,
                 from /usr/include/c++/7/cstdio:42,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:46,
                 from Main.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:232:1: note: declared here
 gets (char *__str)
 ^~~~
Main.cc:4:5: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result]
 gets(s);n=strlen(s);
 ~~~~^~~