#include <stdio.h>#define maxsize 100typedef struct cstr{ char data[maxsize]; int len;}sqstring;sqstring *initsring(char a[]){ sqstring *l; l=(sqstring*)malloc(sizeof(sqstring)); int i=0; while(a[i]) { l->data[i]=a[i]; i++; } l->len=i; return l;}void printstring(sqstring *l){ int i=0; for(i=0;i<l->len;i++) { printf("%c",l->data[i]); } printf("\n");}sqstring *concat(sqstring *s,sqstring *t){ sqstring *l = initsring(""); int i=0; for(i=0;i<s->len;i++) { l->data[i]=s->data[i]; }