創建序列000111222 ...在C++

Question

我希望我的std::cout打印000111222333 ...，但什麼我得到的卻是0111222333 ...，我不知道爲什麼，這裏是我的代碼：

int threeCounter =1; 
int outPut =0; 
for (int i =0; i<300;i++){ 

    if(threeCounter > 3){ 
     outPut++ ; 
     threeCounter=1; 

    } 

    cout << outPut << endl; 
    threeCounter++; 

} 

我試圖在MATLAB中非常相同的代碼，它的產生正確的順序：

threeCounter=1; 
outPut =0; 
for i =1:300 

    if(threeCounter >3) 

     outPut=outPut+1; 
     threeCounter=1; 

    end 
    disp(outPut) 
    threeCounter=threeCounter+1; 

end 

Answer 1

用C試試這個代碼++：

#include <iostream> 
#include <string> 
using namespace std; 

int main() 
{ 
for (int i =0; i<300;i++){ 
    string outPut = ""; 
    int threeCounter =0; 
    while(threeCounter < 3){ 
     outPut = outPut+to_string(i) ; 
     threeCounter+=1; 

    } 

    cout << outPut; 
    threeCounter++; 

} 

}