平成28年度秋季試験_基本情報午後問8

h28a_fe_pm8.c

#include <stdio.h>
#include <string.h>
#define ON  (1)
#define OFF (0)

void edit(char [], char []);

void edit(char pattern[], char value[]) {
  char fill;
  int signif;
  int p, v;
  fill = pattern[0];
  signif = OFF;
  v = 0;
  for (p = 0; p < strlen(pattern); p++) {
    if (pattern[p] == 'w' || pattern[p] == 'b') { /* 表2のケース1〜7の処理 */
      if (signif == OFF) {                        /* ケース1〜5 */
        if (pattern[p] == 'w' && value[v] == '0') {
          /* 何もしない */
        }
        else {
          if (value[v + 1] != '+') {
            signif = ON;
          }
        }
        if (value[v] == '0') {
          pattern[p] = fill;
        }
        else {
          pattern[p] = value[v];
        }
      }
      else {                    /* ケース6,7 */
        if (value[v+1] == '+') {
          signif = OFF;
        }
        pattern[p] = value[v];
      }
      v++;
    }
    else {                      /* 表2のケース8,9の処理 */
      if (signif == OFF) {
        pattern[p] = fill;
      }
    }
  }
}

int main(void) {
  char pattern[][9] = {
                       "  ww,www",
                       "*ww,www#",
                       "*www.ww#",
                       "*wwb.ww#"
  };
  char value[][7]   = {
                       "01234+",
                       "00000+",
                       "00012-",
                       "00012+"
  };
  
  int i, size = sizeof pattern / sizeof pattern[0];
  for (i = 0; i < size; i++) {
    edit(pattern[i], value[i]);
    printf("%s\n", pattern[i]);
  }
  return 0;
}