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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int cmp(const void* n1, const void* n2) {
  5.   if(*(int *)n1 > *(int *)n2) {
  6.     return -1;
  7.   } else if (*(int *)n1 < *(int *) n2) {
  8.     return 1;
  9.   } else {
  10.     return 0;
  11.   }
  12. }
  13.  
  14. int main(void) {
  15.   char buffer[5];
  16.   printf("データ数 : ");
  17.   scanf("%4s%*[^\n]", buffer);
  18.   getchar();
  19.   int num = strtol(buffer, NULL, 10);
  20.   int* score = (int*)malloc(sizeof(int) * num);
  21.   for (int i = 0; i < num; i++) {
  22.     printf("%dつめの点数 : ", i + 1);
  23.     scanf("%4s%*[^\n]", buffer);
  24.     getchar();
  25.     score[i] = strtol(buffer, NULL, 10);
  26.   }
  27.   qsort(score, num, sizeof(int), cmp);
  28.   puts("*** ソート済みのデータ(降順) ***");
  29.   for (int i = 0; i < num; i++) {
  30.     printf("%dつ目の点数 : %d\n", i + 1, score[i]);
  31.   }
  32.   scanf("%4s%*[^\n]", buffer);
  33.   getchar();
  34.   int key = strtol(buffer, NULL, 10);
  35.   int* result = bsearch(&key, score, num, sizeof(int), cmp);
  36.   if (result != NULL) {
  37.     printf("%ld\n", result - score + 1);
  38.   }
  39.   free(score);
  40.   return EXIT_SUCCESS;
  41. }
  42.  
Success #stdin #stdout 0s 5548KB
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データ数 : *** ソート済みのデータ(降順) ***
https://ideone.com/l3uwMR
language:
C (gcc 8.3)
created:
1 year ago
visibility:
secret

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