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I need to make a loop that gets three strings as input from a user and stop if nothing is entered. My code

while(true){ cout << "Enter string1 string2 string3: "; getline(cin,s1, ' '); if(s1.empty()) break; getline(cin, s2, ' '); getline(cin, s3); }

If I don't enter anything, getline waits until I input at least a space. How to make it stop when nothing is entered?

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1 Answer 1

Reset to default
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My suggestion:

  1. Read a line of text.
  2. Use the line to construct a istringstream. Use the istringstream to extract the variables.

Here's what I am thinking:

std::string line; while ( getline(std::cin, line) ) { std::istringstream str(line); if ( !(str >> s1 >> s2 >> s3 ) ) { break; } }
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1 Comment

Thanks, had the same idea, didn't know how to implement in right.

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