C Tutorial/String/String Search
Find occurrences of one string in another
<source lang="cpp">#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;
}</source>
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.