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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     int count[256];
  5.     for (int i = 0 ; i != 256 ; count[i++] = 0);
  6.     char *str = "AACDBACBAabcAcddaAABD";
  7.     for (char *p = str ; *p ; count[(int)*p++]++);
  8.     char array_values[] = { 'A','B','C','D','a','b','c','d' };
  9.     for (int i = 0 ; i != 8 ; i++) {
  10.         printf("Found '%c' %d times\n", array_values[i], count[(int)array_values[i]]);
  11.     }
  12.     return 0;
  13. }
  14.  
Success #stdin #stdout 0s 1788KB
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stdin
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Standard input is empty
stdout
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Found 'A' 7 times
Found 'B' 3 times
Found 'C' 2 times
Found 'D' 2 times
Found 'a' 2 times
Found 'b' 1 times
Found 'c' 2 times
Found 'd' 2 times
https://ideone.com/K8CHln
language:
C99 (gcc 8.3)
created:
10 years ago
visibility:
public

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