Question

Convert C to C++

I need these 4 C file code convert to C++. Please Convert it to C++

//////first C file: Wunzip.c

#include

int main(int argc, char* argv[]) {

if(argc ==1){

printf("wunzip: file1 [file2 ...]\n");

return 1;

}

else{

for(int i =1; i< argc;i++){

int num=-1;

int numout=-1;

int c;

int c1;

  

FILE* file = fopen(argv[i],"rb");

if(file == NULL){

printf("Cannot Open File\n");

return 1;

}

else{

while(numout != 0){

  

numout = fread(&num, sizeof(int), 1, file);

  

c = fread(&c1, sizeof(char), 1, file);

if(c!= 0){

for(int a =0;a< num;a++){

printf("%c",c1);

}}

}

}

fclose(file);

}

return 0;

}

  

}

/// Second C file: wgrep.c

#include

#include

#include

int main(int argc, char* argv[]) {

if(argc ==1){

printf("wgrep: searchterm [file ...]\n");

return 1;

}

else if(argc ==2){

size_t len = 0;

ssize_t linesize=0;

char* output = NULL;

int counter =1;

  

  

while((linesize = getline(&output, &len, stdin)) != -1){

  

   if(strstr(output, argv[1])){

printf( "%s",output);

   counter++;

   }

  

}

return 0;

}

else{

   for(int i =2;i< argc;i++){

FILE *file = fopen(argv[i], "r");

if (file == NULL){

printf("wgrep: cannot open file\n");

return 1;

}

size_t len = 0;

ssize_t linesize=0;

char* output = NULL;

int counter =1;

while((linesize = getline(&output, &len, file)) != -1){

   if(strstr(output, argv[1])){

   printf( "%s",output);

   }

counter++;

  

}

fclose(file);

free(output);

output = NULL;

len = 0;

   }

}

  

return 0;

}

///////Third C file: wcat.c

#include

int main(int argc, char* argv[]) {

if(argc == 1){

return 0;

}

  

//implementing Wcat

for(int i =1;i

char totalBuf[100];

FILE *myFile = fopen(argv[i], "r");

if (myFile == NULL) {

printf("wcat: cannot open file\n");

return 1;

}

while(fgets(totalBuf, 100, myFile) != NULL){

  

printf("%s",totalBuf);

}

fclose(myFile);

}

return 0;

}

/////////Four C file: wzip.c

#include

int main(int argc, char* argv[]) {

char currentC;

char previousC;

int count = 1;

int stop =1;

if(argc == 1 ){

printf( "wzip: file1 [file2 ...]\n");

return 1;

}

else{

for(int i =1;i

FILE *file = fopen(argv[i],"r") ;

if(file == NULL){

   printf("wzip: cannot open file\n");

   return 1;

}

else{

   previousC = fgetc(file);

// FILE *file1 = fopen("newfile","w") ;

while((currentC = fgetc(file)) != EOF){

if(previousC == currentC){

count++;

}

else{

fwrite(&count, 4, 1, stdout);

fwrite(&previousC, sizeof(char), 1, stdout);

previousC = currentC;

count =1;

}

}

fwrite(&count, 4, 1, stdout);

fwrite(&previousC, sizeof(char), 1, stdout);

}

fclose(file);

}

return 0;

}

}

Answer 1

The that you have made is a basic C program that is almost the same like C++ for proper conversion you have to change the header file and some standard output command printf to cout. control follow statement and loops are written in same as C in c++.

//////first C file: Wunzip.c

#include<bits/stdc++.h>//Header file for almost all standard library in cpp
using namespace std;//all the standard function like count cin etc are availabe in this group
int main(int argc, char* argv[])
{
   if(argc == 1){
   cout<<"wunzip: file1 [file2 ...]\n";
   return 1;
   }
   else{
       for(int i =1; i< argc;i++){
           int num=-1;
           int numout=-1;
           int c;
           int c1;
           FILE* file = fopen(argv[i],"rb");
           if(file == NULL){
               //cout instead of printf is used in c++
               cout<<"Cannot Open File\n";
               return 1;
           }
           else{
               while(numout != 0){
                   numout = fread(&num, sizeof(int), 1, file);
                   c = fread(&c1, sizeof(char), 1, file);
                   if(c!= 0){
                       for(int a =0;a< num;a++){
                       /*cout instead of printf is used in c++ and it
                       doesn't use identifier like "%d" that we use in printf*/
                       cout<<c1;
                       }
                   }
               }
           }
           fclose(file);
       }
return 0;
}
}

/// Second C file: wgrep.c

#include<bits/stdc++.h>//Header file for almost all standard library in cpp
using namespace std;//all the standard function like count cin etc are availabe in this group
int main(int argc, char* argv[]) {
if(argc == 1){
cout<<"wgrep: searchterm [file ...]\n";
return 1;
}
else if(argc ==2){
size_t len = 0;
ssize_t linesize=0;
char* output = NULL;
int counter =1;
while((linesize = getline(&output, &len, stdin)) != -1){
   if(strstr(output, argv[1])){
   /*cout instead of printf is used in c++ and it
   doesn't use identifier like "%d" that we use in printf*/
   cout<<output;
   counter++;
   }
}
return 0;
}
else{
   for(int i =2;i< argc;i++){
FILE *file = fopen(argv[i], "r");
if (file == NULL){
//cout instead of printf is used in c++
cout<<"wgrep: cannot open file\n";
return 1;
}
size_t len = 0;
ssize_t linesize=0;
char* output = NULL;
int counter =1;
while((linesize = getline(&output, &len, file)) != -1){
   if(strstr(output, argv[1])){
   /*cout instead of printf is used in c++ and it
   doesn't use identifier like "%d" that we use in printf*/
   cout<<output;
   }
counter++;
}
fclose(file);
free(output);
output = NULL;
len = 0;
   }
}
return 0;
}

///////Third C file: wcat.c

#include<bits/stdc++.h>//Header file for almost all standard library in cpp
using namespace std;//all the standard function like count cin etc are availabe in this group
int main(int argc, char* argv[]) {
   if(argc == 1){
   return 0;
   }
//implementing Wcat
   for(int i =1;i< argc;i++){
       char totalBuf[100];
       FILE *myFile = fopen(argv[i], "r");
       if (myFile == NULL) {
           cout<<"wcat: cannot open file\n";
           return 1;
       }
       while(fgets(totalBuf, 100, myFile) != NULL){
           cout<<totalBuf;
           }
       fclose(myFile);

       }

return 0;

}

/////////Four C file: wzip.c

#include<bits/stdc++.h>//Header file for almost all standard library in cpp
using namespace std;//all the standard function like count cin etc are availabe in this group
int main(int argc, char* argv[]) {
char currentC;
char previousC;
int count = 1;
int stop =1;
if(argc == 1 ){
   cout<<"wzip: file1 [file2 ...]\n";
   return 1;}
else{for(int i =1;i< argc;i++){
       FILE *file = fopen(argv[i],"r") ;
       if(file == NULL){
        cout<<"wzip: cannot open file\n";
       return 1;
       }
       else{
        previousC = fgetc(file);
       // FILE *file1 = fopen("newfile","w") ;
       while((currentC = fgetc(file)) != EOF){
           if(previousC == currentC){
               count++;
           }else{
               fwrite(&count, 4, 1, stdout);
               fwrite(&previousC, sizeof(char), 1, stdout);
               previousC = currentC;
               count =1;  
               }}
           fwrite(&count, 4, 1, stdout);
           fwrite(&previousC, sizeof(char), 1, stdout);
           }

       fclose(file);   }   return 0;
   }
}

Screenshot of code

Note:- Because I don't have the input file, I can't show you result or output