Check substring exists in a string in C
Use strstr for this.
http://www.cplusplus.com/reference/clibrary/cstring/strstr/
So, you'd write it like..
char *sent = "this is my sample example";char *word = "sample";char *pch = strstr(sent, word);if(pch){ ...}
Try to use pointers...
#include <stdio.h>#include <string.h>int main(){ char str[] = "String1 subString1 Strinstrnd subStr ing1subString"; char sub[] = "subString"; char *p1, *p2, *p3; int i=0,j=0,flag=0; p1 = str; p2 = sub; for(i = 0; i<strlen(str); i++) { if(*p1 == *p2) { p3 = p1; for(j = 0;j<strlen(sub);j++) { if(*p3 == *p2) { p3++;p2++; } else break; } p2 = sub; if(j == strlen(sub)) { flag = 1; printf("\nSubstring found at index : %d\n",i); } } p1++; } if(flag==0) { printf("Substring NOT found"); }return (0);}