#include int main() { int i,j; printf(" 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19\n"); printf(" ┌一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┬一┐\n"); for(i=0;i<18;i++) { printf(" ├一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┼一┤\n"); } printf(" └一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┴一┘\n"); printf(" 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19\n"); return 0; }