问题描述 编写一个程序,打印输入中各个字符出现频度的直方图 #include /* NUM_CHARS should really be CHAR_MAX but K&R haven't covered that at this stage in the book / #define NUM_CHARS 256 int main(void) { int c; long freqarr[NUM_CHARS + 1]; long thisval = 0; long maxval = 0; int t