c语言的简单问题
#include <stdio.h>#define N 80char *mystrcat(char *dststr,char *srcstr)int main(){ char first[2*N]; char second [N]; printf("input first"); gets(first); printf("input second"); gets(second); printf("the result is:%s ",mystrcat(first,second)); return 0;}char*mystrcat(char*dststr,char*srcstr){ char*pstr=dststr; while(*dststr='