正确例题
#include
using namespace std;
int main()
{
cout << “\033[40;30;4m” << “■■” << endl;
cout << “\033[41;31;4m” << “■■” << endl;
cout << “\033[42;32;4m” << “■■” << endl;
cout << “\033[43;33;4m” << “■■” << endl;
cout << “\033[44;34;4m” << “■■” << endl;
cout << “\033[45;35;4m” << “■■” << endl;
cout << “\033[46;36;4m” << “■■” << endl;
cout << “\033[47;37;4m” << “■■” << endl;
return 0;
}

正确例题
#include
using namespace std;
int main()
{
cout << “\033[30;30;4m” << “■■” << endl;
cout << “\033[30;31;4m” << “■■” << endl;
cout << “\033[30;32;4m” << “■■” << endl;
cout << “\033[30;33;4m” << “■■” << endl;
cout << “\033[30;34;4m” << “■■” << endl;
cout << “\033[30;35;4m” << “■■” << endl;
cout << “\033[30;36;4m” << “■■” << endl;
cout << “\033[30;37;4m” << “■■” << endl;

cout << "\n\n\n" << endl;

cout << "\033[30;40;4m" <<  "  " << endl;
cout << "\033[30;41;4m" <<  "  " << endl;
cout << "\033[30;42;4m" <<  "  " << endl;
cout << "\033[30;43;4m" <<  "  " << endl;
cout << "\033[30;44;4m" <<  "  " << endl;
cout << "\033[30;45;4m" <<  "  " << endl;
cout << "\033[30;46;4m" <<  "  " << endl;
cout << "\033[30;47;4m" <<  "  " << endl;
return 0;

}

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