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  1. #include<stdio.h>
  2. #include<string.h>
  3.  
  4. int YenCov(int, int, char *, int);
  5.  
  6. int main(void) {
  7.   int kingaku;
  8.   int mode;
  9.   int datsize;
  10.   int rtn;
  11.   char kindat[15];
  12.  
  13.   printf("金額入力==>");
  14.   scanf("%d", &kingaku);
  15.  
  16.   printf("モード(1 or 2)==>");
  17.   scanf("%d", &mode);
  18.  
  19.   printf("データサイズ==>");
  20.   scanf("%d", &datsize);
  21.  
  22.   rtn = YenCov(kingaku, mode, kindat, datsize);
  23.  
  24.   if (rtn == -1) {
  25.     printf("モードエラー\n");
  26.   } else if (rtn == -2) {
  27.     printf("領域不足エラー\n");
  28.   } else {
  29.     printf("編集金額 = %s\n", kindat);
  30.   }
  31.  
  32.   return 0;
  33. }
  34.  
  35. int YenCov(int kin, int md, char *bp, int size) {
  36.   char buf1[15]; /* 対象データ格納用 */
  37.   char buf2[15]; /* \マーク編集結果を格納 */
  38.   int len; /* 対象データ文字数格納用 */
  39.   int cmcnt; /* 挿入カンマ数カウンタ */
  40.   int cnt; /* コピー文字数カウンタ */
  41.   int i, j;
  42.  
  43.   cnt = 0;
  44.  
  45.   if (md != 1 && md != 2) {
  46.     return -1;
  47.   }
  48.  
  49.   sprintf(buf1, "\\%d", kin); /* 金額を文字列としてbuf1に格納 */
  50.  
  51.   len = strlen(buf1);
  52.   if (md == 1) {
  53.     cmcnt = 0;
  54.   } else {
  55.     cmcnt = (len - 2) / 3;
  56.   }
  57.  
  58.   if (len + cmcnt + 1 > size) {
  59.     return -2;
  60.   }
  61.  
  62.   if (md == 1) {
  63.     strcpy(buf2, buf1);
  64.   } else {
  65.     buf2[len + cmcnt] = '\0';
  66.     for (i = len - 1; i >= 0; i--) {
  67.       j = i + cmcnt;
  68.       if (cnt == 3 && cmcnt != 0) {
  69.         /* ①番   カンマ代入 */
  70.         buf2[j] = ',';
  71.         cnt = 0;
  72.         cmcnt--;
  73.         /* ②番  添え字の更新 */
  74.         j--;
  75.       }
  76.       /* ③番  数値文字の結果の代入 */
  77.       buf2[j] = buf1[i];
  78.       cnt++;
  79.     }
  80.   }
  81.   strcpy(bp, buf2);
  82.   return 0;
  83. }
Success #stdin #stdout 0.02s 1680KB
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stdin
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stdout
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金額入力==>モード(1 or 2)==>データサイズ==>編集金額 = \123,456,789
https://ideone.com/IGVURk
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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