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  1. #include <stdio.h>
  2. #include <ctype.h>
  3. #include <assert.h>
  4.  
  5. void convert(const char *in, char *out) {
  6.   unsigned int sum = 0;
  7.   char ch;
  8.   do {
  9.     ch = *in++;
  10.     if (isdigit(ch)) {
  11.       sum += ch - '0';
  12.     } else {
  13.       *out++ = sum / 10 + '0';
  14.       *out++ = sum % 10 + '0';
  15.       if (ch == '.') {
  16.         *out++ = '.';
  17.         sum = 0;
  18.       }
  19.     }
  20.   } while (ch);
  21. }
  22.  
  23. main() {
  24.  /*
  25.   stream version:
  26.  
  27.   unsigned int sum = 0;
  28.   int ch;
  29.   do {
  30.     ch = getchar();
  31.     if (isdigit(ch)) {
  32.       sum += ch - '0';
  33.     } else {
  34.       putchar(sum / 10 + '0');
  35.       putchar(sum % 10 + '0');
  36.       if (ch == '.') {
  37.         putchar('.');
  38.         sum = 0;
  39.       }
  40.     }
  41.   } while (ch != EOF);
  42.  */
  43.  
  44.   char buf[16] = { 0 };
  45.   convert("112.234.456.789", buf);
  46.   assert(!strcmp(buf, "04.09.15.24"));
  47.   return 0;
  48. }
Success #stdin #stdout 0.01s 1716KB
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112.234.456.789
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Standard output is empty
https://ideone.com/mXYNa
language:
C (gcc 8.3)
created:
13 years ago
visibility:
public

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