Find occurrences of one string in another
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main(void)
{
char text[100];
char substring[40];
printf("\nEnter the string to be searched(less than 100 characters):\n");
fgets(text, sizeof(text), stdin);
printf("\nEnter the string sought (less than 40 characters ):\n");
fgets(substring, sizeof(substring), stdin);
/* overwrite the newline character in each string */
text[strlen(text)-1] = "\0";
substring[strlen(substring)-1] = "\0";
int i;
for(i = 0 ; (text[i] = toupper(text[i])) ; i++);
for(i = 0 ; (substring[i] = toupper(substring[i])) ; i++);
printf("\nThe second string %s found in the first.",((strstr(text, substring) == NULL) ? "was not" : "was"));
return 0;
}Enter the string to be searched(less than 100 characters):
string
Enter the string sought (less than 40 characters ):
str
The second string was found in the first.
