how to put "a string",a number,"a string",another number in a string arra

Question

I have question about putting data below in a string array , I mean that is it possible to do as bellow:

for(int i{};i<num;i++)
    string[i]={"The degree of",i,"'th vertice is",degree[i]}

I have tried that and I know its not practical in c++ but is there any other way to do so, my goal is to return a string that number of each degree is saved in by a function called degree,as what I have mentioned (for example "The degree of 4'th vertice is 2") . so is there possible to do so? I want to call the function as below:

std::cout<<degree();

thanks for your attention.

`string[i] = "The degree of " + std::to_string(i) + "'th vertice is " + std::to_string(degree[i]);` — JLev, Nov 08 '17 at 11:12
thanks for your answer but is there possible to save text below in string and not string array: (The degree of 4'th vertice is 2 (new line) The degree of 5'th vertice is 3 (new line) The degree of 6'th vertice is 0 (new line) The degree of 7'th vertice is 6) — A.R.S.D., Nov 08 '17 at 11:20
please provide a [mcve]. You better ask for what you want to do and not for something different ;) You cant print a string array like this `std::cout< — 463035818_is_not_an_ai, Nov 08 '17 at 11:25
sorry for not expressing my mean correctly I want to store all vertice degrees in one string so when I call the function like this: std::cout< — A.R.S.D., Nov 08 '17 at 11:39

score 1 · Answer 1 · answered Nov 08 '17 at 12:02

1

Sure, you can put everything in a single string and put a newline ('\n') between each logical line. Just combine the code snippets given above:

std::string degrees()
{
    std::string   lines;

    for(int i{};i<num;i++)
        lines += "The degree of " + std::to_string(i) +
                 "'th vertice is " + std::to_string(degree[i]) + '\n';

   return lines;
}

answered Nov 08 '17 at 12:02

Bo Persson

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@A.salehy Then mark it as [accepted answer](https://stackoverflow.com/help/accepted-answer)! This the right way to say thank you in SO. – HMD Nov 08 '17 at 13:08

Killzone Kid · Answer 2 · 2017-11-08T12:37:00.030

1

You could try something like this as well (edited to remove argument passing to degrees fnc, as OP doesn't want that):

#include <iostream>
#include <sstream>

std::vector<int> degree = { 1,5,4,8,2,12,4,30,45,22 };

std::string degrees()
{
    std::ostringstream oss;

    for (size_t i = 0; i < degree.size(); ++i)
        oss << (i > 0 ? "\n" : "") << "The degree of " << i + 1 << "'th vertice is " << degree[i];

    return oss.str();
}

int main()
{

    std::cout << degrees() << std::endl;

    return 0;
}

Prints:

edited Nov 08 '17 at 12:37

answered Nov 08 '17 at 12:15

Killzone Kid

6,171
3
17
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Suggesting a small improvement: Use `std::ostringstream` if you don't need input operations. – Murphy Nov 08 '17 at 12:16
thanks for answer but I have to use function "degree" without any parameter. – A.R.S.D. Nov 08 '17 at 12:32
@A.salehy Edited my answer – Killzone Kid Nov 08 '17 at 12:37

how to put "a string",a number,"a string",another number in a string arra

2 Answers2