In other word how to make my code working if I don't want to write it one line?
#include <string>
using namespace std;
int main()
{
string menu = "";
menu += "MENU:\n"
+ "1. option 1\n"
+ "2. option 2\n"
+ "3. option 3\n"
+ "4. 10 more options\n";
}
Simply remove the +'s:
#include <string>
int main()
{
std::string menu = "MENU:\n"
"1. option 1\n"
"2. option 2\n"
"3. option 3\n"
"4. 10 more options\n";
}
Adjacent string literals are automatically concatenated by the compiler.
Alternatively, in C++11, you can use raw string literals, which preserve all indentation and newlines:
#include <string>
int main()
{
std::string menu = R"(MENU:
1. option 1
2. option 2
3. option 3
4. 10 more options
)";
}
You don't need the +s. By just leaving those out, the compiler will concatenate all the string literals into one long string:
menu += "MENU:\n"
"1. option 1\n"
"2. option 2\n"
"3. option 3\n"
"4. 10 more options\n";
"a" "b" into "ab".
Just remove the add operators in your example. Consecutive strings with nothing between them are simply concatenated. So, for example, the two consecutive tokens "hello " "world" is the same as "hello world". But keep in mind that source code line breaks can separate any two tokens, so "hello " and "world" can be on separate lines, just as you wish.
+s?