How to not print ": " at the end?-CodePudding

Read in an input value for variable numInput. Then, read numInput integers from input and output each on the same line with the character ": " between each value.

Ex: If the input is 5 10 -15 -95 -25 25, the output is: 10: -15: -95: -25: 25

Note: ": " should not be at the beginning or end of the output.

Currently, the code prints ": " at the end of the output. How to not print ": " at the end so as to get the expected output?

#include <iostream>
using namespace std;

int main() {
  int numInput;

  cin >> numInput;
  while(cin >> numInput) {
    cout << numInput << ": ";
  }
  cout << endl;
  return 0;
}

CodePudding user response：

Very similar to the solution proposed by @RemyLebeau in comments.

#include <iostream>
#include <string>

int main() {
    int numInput;
    std::string beginning = "";

    std::cin >> numInput;
  
    while (std::cin >> numInput) {
        std::cout << beginning << numInput;
        beginning = ": ";
    }

    std::cout << std::endl;
  
    return 0;
}

"" will be printed before the first input int. Subsequently beginning is changed to ": " and that will be printed before each input. The end result is that : will appear after every input except the last one.

CodePudding user response：

You are printing ; after each input number. You should instead output the 1st number by itself, and then output ; before each subsequent number, eg:

#include <iostream>
using namespace std;

int main() {
    int numInput, input;
    if (cin >> numInput && numInput > 0) {
        if (cin >> input) {
            cout << input;
            while (--numInput > 0 && cin >> input) {
                cout << ": " << input;
            }
            cout << endl;
        }
    }
    return 0;
}

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