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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. #define SIZE 300
  5.  
  6. int main(void)
  7. {
  8.     char sentence[SIZE];
  9.     char searchString[SIZE];
  10.  
  11.     printf("Enter a line of text:\n");
  12.     fgets(sentence, SIZE, stdin);
  13.  
  14.     printf("Enter the search string:\n");
  15.     fgets(searchString, SIZE, stdin);
  16.  
  17.     sentence[strcspn(sentence, "\n")] = '\0';
  18.     searchString[strcspn(searchString, "\n")] = '\0';
  19.  
  20.     char *searchPtr =
  21.         strstr(sentence, searchString);
  22.  
  23.     if (searchPtr == NULL)
  24.     {
  25.         printf("The search string was not found.\n");
  26.     }
  27.     else
  28.     {
  29.         printf("\nThe first occurrence is:\n");
  30.         printf("%s\n", searchPtr);
  31.  
  32.         searchPtr =
  33.             strstr(searchPtr + 1, searchString);
  34.  
  35.         if (searchPtr != NULL)
  36.         {
  37.             printf("\nThe second occurrence is:\n");
  38.             printf("%s\n", searchPtr);
  39.         }
  40.         else
  41.         {
  42.             printf("\nThere is no second occurrence.\n");
  43.         }
  44.     }
  45.  
  46.     return 0;
  47. }
Success #stdin #stdout 0s 5348KB
comments (?)
stdin 
Standard input is empty
stdout 
Enter a line of text:
Enter the search string:
The search string was not found.
https://ideone.com/TavM8I
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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