Check if string contains substring c.
C Find subString
strstr
- Returns a pointer to the first occurrence of
str2instr1, or a null pointer ifstr2is not part ofstr1. - The matching process does not include the terminating null-characters, but it stops there.
Parameters
- str1 – C string to be scanned.
- str2 – C string containing the sequence of characters to match.
Find subString in C
#include <stdio.h> #include <string.h> int main() { char str[] = "This is a simple string"; char * simp; simp = strstr(str, "simple"); if (simp != NULL) strncpy(simp, "sample", 6); puts(str); return 0; }
// This is a sample string
Find subString in String C
#include <stdio.h> #include <string.h> int main(void) { char mainstring[] = "Hello World"; char substring[20], * ret; int i = 0; puts("Enter the subString to find"); fgets(substring, sizeof(substring), stdin); substring[strlen(substring) - 1] = '\0'; ret = strstr(mainstring, substring); if (strcmp((ret = strstr(mainstring, substring)), substring)) { printf("subString is present\t"); } printf("And the subString is:::"); for (i = 0; i < strlen(substring); i++) { printf("%c", *(ret + i)); } puts("\n"); return 0; }
Enter the subString to find World And the subString is:::World