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  1. #include <stdio.h>
  2. #include <string.h>
  3. #define MAX_SIZE 100 // Maximum string size
  4.  
  5. int main()
  6. {
  7.     char str[MAX_SIZE], word[MAX_SIZE];
  8.     int i, index, found = 0;
  9.  
  10.     /* Input string and word from user */
  11.     printf("Enter any string: ");
  12.     gets(str);
  13.     printf("Enter word to be searched: ");
  14.     gets(word);
  15.  
  16.  
  17.     /* Run loop from start to end of string */
  18.     index = 0;
  19.     while(str[index] != '\0')
  20.     {
  21.  
  22.         /* If first character of word matches with the given string */
  23.         if(str[index] == word[0])
  24.         {
  25.             /* Match entire word with current found index */
  26.             i=0;
  27.             found = 1;
  28.             while(word[i] != '\0')
  29.             {
  30.                 if(str[index + i] != word[i])
  31.                 {
  32.                     found = 0;
  33.                     break;
  34.                 }
  35.  
  36.                 i++;
  37.             }
  38.         }
  39.  
  40.         /* If the word is found then get out of loop */
  41.         if(found == 1)
  42.         {
  43.             break;
  44.         }
  45.  
  46.         index++;
  47.     }
  48.  
  49.     /*  Print success message if the word is found */
  50.     if(found == 1)
  51.     {
  52.         printf("\n'%s' is found at index %d.", word, index);
  53.     }
  54.     else
  55.     {
  56.         printf("\n'%s' is not found.", word);
  57.     }
  58.  
  59.     return 0;
  60. }
Success #stdin #stdout 0s 4544KB
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Enter any string: Enter word to be searched: 
'tr' is found at index 0.
https://ideone.com/3Q09us
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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