Из массива выходят странные числа

Здравствуйте у меня проблема, при создании массива генерируются правильные числа, а при взятии этих чисел в другой файл выводится всякая фигня.
613228528 32765 88615552
-2029537266 0 35397344
-613228464 32765 88717360
-613228480 32765 90551144
-613228528 0 3
-2029537266 0 90551144
-613228312 32765 88819029
-613228464 32765 90677745
-1 0 90556176
-1 0 32
-25761258 0 88615984
Помогите пожалуйста исправить, вот мой код:

#include <iostream>
#include <vector>
#include <fstream>
#include <ctime>
#include <sys/types.h>
#include <unistd.h>
void generate_array (std::string file_name_arr , int max_num){
std::ofstream out {file_name_arr};
for (int i= 0; i < 5; ++i) {
for (int j = 0; j < 100; ++j) {
out << rand() % (max_num + 1) << " ";
}
out << std::endl;
}
out.close();
}
void search_follow_ascending (std::string file_name_arr, std ::string file_name_result, int i_arr){
std::ifstream in {file_name_arr};
int arr [5][100];
for (int i = 0; i < 5; ++i) {
for (int j = 0; j < 100; ++j) {
in >> arr[i][i];
}
}
in.close();
std::vector<std::vector<int>> follow_ascending;
for (int j = 1, i_vector{0}; j < 100; ++j) {
if (arr[i_arr][j] > arr[i_arr][j - 1]){
if (follow_ascending.size() == i_vector){
std::vector<int> temp;
follow_ascending. push_back(temp);
follow_ascending[i_vector] .push_back(arr[i_arr][j -1]);
}
follow_ascending[i_vector ].push_back(arr[i_arr][j]);
if (arr[i_arr][j + 1] < arr[i_arr][j])
i_vector++;
}
}
int max_elem_in_vector {0};
for (int i = 0; i < follow_ascending.size(); ++i) {
if (follow_ascending[i].size() > max_elem_in_vector)
max_elem_in_vector = follow_ascending[i].size();
}
std::ofstream out {file_name_result};
for (int i = 0; i < follow_ascending.size(); ++i) {
if(follow_ascending[i].size() == max_elem_in_vector){
for (int j = 0; j < follow_ascending[i].size(); ++j) {
out << follow_ascending[i][j] << " ";
}
out << std::endl;
}
}
out.close();
}
void search_descending_ascending (std::string file_name_arr, std::string file_name_result, int i_arr){
srand(time(0));
std::ifstream in {file_name_arr};
int arr [5][100];
for (int i = 0; i < 5; ++i) {
for (int j = 0; j < 100; ++j) {
in >> arr[i][j];
}
}
std::vector<std::vector<int>> descending_ascending;
for (int j = 1, i_vector{0}; j < 100; ++j) {
if (arr[i_arr][j] < arr[i_arr][j - 1]){
if (descending_ascending.size() == i_vector){
std::vector<int> temp;
descending_ascending.push_back(temp);
descending_ascending[i_vector ].push_back(arr[i_arr][j - 1]);
}
descending_ascending[i_vector ].push_back(arr[i_arr][j]);
if (arr[i_arr][j + 1] > arr[i_arr][j])
i_vector++;
}
}
int max_elem_in_vector {0};
for (int i = 0; i < descending_ascending.size(); ++i) {
if (descending_ascending[i].size() > max_elem_in_vector)
max_elem_in_vector = descending_ascending[i].size();
}
std::ofstream out {file_name_result};
for (int i = 0; i < descending_ascending.size(); ++i) {
if(descending_ascending[i].size() == max_elem_in_vector){
for (int j = 0; j < descending_ascending[i].size(); ++j) {
out << descending_ascending[i][j] << " ";
}
out << std::endl;
}
}
out.close();
}

int main() {
srand(time(0));
generate_array("array.txt", 100);
pid_t pid1;
pid1=fork();
if (pid1 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid1 == 0){
std::cout << "this is child process 1. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "follow_ascending_1.txt", 0);
exit(0);
}
pid_t pid2;
pid2=fork();
if (pid2 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid2 == 0){
std::cout << "this is child process 2. my pid " << getpid() << std::endl;
search_follow_ascending("array.txt", "descending_ascending_1.txt", 0);
exit(0);
}
pid_t pid3;
pid3=fork();
if (pid3 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid3 == 0){
std::cout << "this is child process 3. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "follow_ascending_2.txt", 1);
exit(0);
}
pid_t pid4;
pid4=fork();
if (pid4 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid4 == 0){
std::cout << "this is child process 4. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "descending_ascending_2.txt", 1);
exit(0);
}
pid_t pid5;
pid5=fork();
if (pid5 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid5 == 0){
std::cout << "this is child process 5. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "follow_ascending_3.txt", 2);
exit(0);
}
pid_t pid6;
pid6=fork();
if (pid6 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid6 == 0){
std::cout << "this is child process 6. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "descending_ascending_3.txt", 2);
exit(0);
}
pid_t pid7;
pid7=fork();
if (pid7 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid7 == 0){
std::cout << "this is child process 7. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "follow_ascending_4.txt", 3);
exit(0);
}
pid_t pid8;
pid8=fork();
if (pid8 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid8 == 0){
std::cout << "this is child process 8. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "descending_ascending_4.txt", 3);
exit(0);
}
pid_t pid9;
pid9=fork();
if (pid9 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid9 == 0){
std::cout << "this is child process 9. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "follow_ascending_5.txt", 4);
exit(0);
}
pid_t pid10;
pid10=fork();
if (pid10 < 0){
std::cout << "Cannot create child process.Exit!!!" << std::endl;
exit(1);}
else if (pid10 == 0){
std::cout << "this is child process 10. my pid " << getpid()<<std::endl;
search_follow_ascending("array.txt", "descending_ascending_5.txt", 4);
exit(0);
}
else {
std::cout << "This is parents process. ID: "<< getppid()<< std::endl;}
return 0;
}

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