用C ++输出ascii表

码：

#include <iostream> #include <iomanip> using namespace std; class Ascii_output { public: void run() { print_ascii(); } private: void print_ascii() { int i, j; // i is used to print the first element of each row // j is used to print subsequent columns of a given row char ch; // ch stores the character which is to be printed cout << left; for (i = 32; i < 64; i++) { // 33 rows are printed out (64-32+1) ch = i; if (ch != '\n') // replaces any newline printouts with a blank character cout << setw(3) << i << " " << setw(6) << ch; else cout << setw(3) << i << " " << setw(6); for (j = 1; j < 7; j++) { // decides the amount of columns to be printed out, "j < 7" dictates this ch += 32*j; // offsets the column by a multiple of 32 if (ch != '\n') // replaces any newline printouts with a blank character cout << setw(3) << i+(32*j) << " " << setw(6) << ch; else cout << setw(3) << i+(32*j) << " " << setw(6); } cout << endl; } } }; 

输出：

为什么我没有得到一个正确缩进的输出和奇怪的字符值96 – 255？

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 ch += 32*j; 

 ch += 32; 

 ch = i + 32*j; 

 cout << setw(3) << i+(32*j) << " " << setw(6) << ch; 

 cout << setw(3) << int(ch) << " " << setw(6) << ch;