Implementing piping in c++ - c++

Question

I'm trying to implement piping in C++. My method piped takes in an array of arguments along the line of yes | head -10 | wc. It creates pipes number of processes and changes the image of the processes to, following that example, yes, head -10, and wc. Then it creates pipes-2 pipes and redirects the input and output of the processes to the pipes.
It's not working correctly, and just prints each command separately without redirecting input/output.
#include "piped.h"
using namespace std;
void piped(char *stringList[], int pipes)
{
//stringList[] is list of arguments seperated by |
//pipes = number of arguments
pid_t processList[256];
char *curList[256];
//Create a new process for each job using fork
for(int i = 0; i < pipes; i++){
processList[i] = fork();
if (processList[i] < 0) {
cerr << "Couldn't create process\n";
exit(1);
}
}
int j = 0;
//Replace the image of each process with the appropriate commands
for(int i = 0; i < pipes; i++){
pid_t pid = processList[i];
if(pid == 0){
char *check = stringList[j];
int k = 0;
while(true){
curList[k] = check;
j+=1;
k+=1;
check = stringList[j];
if(check == NULL || strcmp(check, "|") == 0){
break;
}
}
j+=1;
curList[k] = NULL;
execvp(curList[0], curList);
cout << "Exec error!\n";
exit(1);
}
}
//Piping
//create n-2 pipes
//redirect the output of job i to the write end of pipe i
//redirect the input of job i to the read end of pipe i
for(int i = 0; i < pipes-1; i++){
int pipefd[2];
if(pipe(pipefd) < 0){
cout << "Pipe error!\n";
}
int pid1 = processList[i];
int pid2 = processList[i+1];
if(0 == pid2){
//Child 2
close(pipefd[1]);
dup2(pipefd[0],1);
close(pipefd[0]);
}
if(0 == pid1){
close(pipefd[0]);
dup2(pipefd[1], 0);
close(pipefd[1]);
}
}
//Wait for all jobs to terminate
for(int i = 0; i < pipes; i++){
pid_t pid = processList[i];
waitpid(pid, NULL, 0);
}
}