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Strings
one-dimensional array of characters terminated by a null character '\0'.
strcpy(s1, s2);
Copies string s2 into string s1.
strcat(s1, s2);
Concatenates string s2 onto the end of string s1.
strlen(s1);
Returns the length of string s1.
strcmp(s1, s2);
Returns 0 if s1 and s2 are the same; less than 0 if s1<s2; greater than 0 if s1>s2.
strchr(s1, ch);
Returns a pointer to the first occurrence of character ch in string s1.
strstr(s1, s2);
Returns a pointer to the first occurrence of string s2 in string s1.
