求C语言大神解释呀~~急

#include#include#includechar*lianjie(char array1[],char array2[]);char*p,array1[50],array2[50];int i,j;int main(){gets(array1);gets(array2);p=lianjie(array1,array2);puts(p);free(p);return 0;}char*lianjie(char array1[],char array2[]){p=(char*)malloc(100);i