Filehandeling in c++

Q) Program in C++ to read a text file and convert all letters into uppercase and save on another text file.

#include<iostream>
#include<stdio.h>
using namespace std;

void uppercase()
{char p;
char chi;
    FILE *fp;
    FILE *rp;

    fp=fopen("rem.txt","r");
    rp=fopen("mem.txt","w");
    char ch =getc(fp);

    while(ch!=EOF)
    {

        if(97<=ch&&ch<=122)
        {p=ch;
           p=p-32;
           cout<<p;
        putc(p,rp);
        }

      else
        {  chi=ch;
        cout<<ch;
        putc(chi,rp);
      }
 ch=getc(fp);

    }}
int main()
{
  uppercase();
   
return 0;
}

Filehandeling :Reading a text file

Q) Program to  read a text file and calculate number of tabs,new lines,spaces,characters in it.

#include <iostream>
#include<stdio.h>
using namespace std;

int main()

{
int tab=0,lines=0,pa=0,charec=0;
FILE *fp;
char ch;
fp=fopen("mim.txt","r");
ch=getc(fp);
    while(ch!=EOF)
    {   if(ch=='\t')
       tab++;
       if(ch=='\n')
       lines++;
       if(ch==' ')
       pa++;
       charec++;
       ch=getc(fp);
    }

cout<<"number of tabs ="<<tab<<endl;
cout<<"number of new lines ="<<lines<<endl;
cout<<"number of spaces ="<<pa<<endl;
cout<<"number of characters ="<<charec<<endl;
fclose(fp);
return 0;
}