#include <iostream>#include <string.h>#include <stdlib.h>#include <stdio.h>using namespace std;int main(int argc, char *argv[]){char cl = ‘A‘;cout << ‘W‘ << ‘ ‘;cout << cl << endl;cout << "this is a test." << endl;cout << "----------" << endl;char *name="howareyou";char ch;FILE *fp;if((fp=fopen("./bs.txt","r"))==NULL){    cout << "err"<<endl;} ch=fgetc(fp);  while(ch!=EOF) {    if(ch==‘\n‘)    cout<< "a new line"<<endl;        putchar(ch);         ch=fgetc(fp); } printf("I need %s %d",name,5);string path="\\home";cout << path;return 0;}char* readline(FILE* f){    char* line = (char*) calloc(1, sizeof(char) );;    char c;    int len = 0;        while ( (c = fgetc(f) ) != EOF && c != ‘/n‘)    {        line = (char*) realloc(line, sizeof(char) * (len + 2) );        line[len++] = c;        line[len] = ‘/0‘;    }    return line;}