Discussion
What will be the output of the following C code?
const char str1[10]="Helloworld";
const char str2[10] = "world";
char *mat;
mat = strstr(str1, str2);
printf("The substring is:%s\n", mat);
Answer: A
Correct answer: The substring is:world
strstr(str1, str2) finds the first occurrence of "world" inside "Helloworld" and returns a pointer to where it begins - not a copy. Printing from that pointer therefore gives world, the rest of the string from the match onwards.
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