Warning: assignment makes integer from pointer without a cast - c

Question

I'm learning C almost one year and it's my first time that I got that warnings.
This is my code:
#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include <windows.h>
#include <string.h>
int socket_creation(FILE* fp){
int s;
s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s == INVALID_SOCKET){
printf("Error occurred while creating socket: %d\n", WSAGetLastError());
fprintf(fp, "Error occurred while creating socket: %d\n", WSAGetLastError());
}
else{
printf("Socket creation was successful.\n");
fprintf(fp, "Socket creation was successful.\n");
}
return s;
}
void connect_to_server(int s, struct sockaddr_in ClientService, FILE* fp){
int cResult;
cResult = connect(s, (struct sockaddr*) &ClientService, sizeof(ClientService));
if (cResult == SOCKET_ERROR){
printf("connection to the server has been failed: %d\n", WSAGetLastError());
fprintf(fp, "connection to the server has been failed: %d\n", WSAGetLastError());
cResult = closesocket(s);
if (cResult == SOCKET_ERROR){
printf("error occurred while trying to close socket. \n");
fprintf(fp, "error occurred while trying to close socket. \n");
}
WSACleanup();
}
else{
printf("Connection to serevr has been made successfully. \n");
fprintf(fp, "Connection to serevr has been made successfully. \n");
}
}
int send_to_serv(char buffer[], int s){
int sendto;
sendto = send(s, buffer, 1024, 0);
if (sendto == -1)
printf("\nError: couldn't send the Code.\n", buffer);
else printf("\nCode: <%s> SENT.\n", buffer);
return sendto;
}
int recv_from_serv(int s, int* numberLines, FILE *fp){
int recvfrom;
char buffer[1024] = "";
recvfrom = recv(s, buffer, 1024, 0);
if (recvfrom == -1)
printf("\nError: couldn't receive Code. !\n");
else printf("\nRespond: <%s>, RECEIVED. \n", buffer);
fprintf(fp, "\n");
fprintf(fp, buffer);
*numberLines = atoi(buffer + 3);
return recvfrom;
}
int main() {
WSADATA info;
int error, s;
int sResults, sendError, recvError,convert2;
char buffer[1024] = "";
char recvbuf[1024] = "";
int numberLines, i, temp, convert;
char converted_num[1024] = "";
struct sockaddr_in ClientService;
FILE *fp = fopen("stored_data.txt", "w");
char* lines_array;
error = WSAStartup(MAKEWORD(2, 0), &info);
if (error != 0){
printf("WSAstartup failed with error: %d\n", error);
exit(1);
}
for (i=0; i <=numberLines; i++) {
lines_array[i]=NULL;
}
s = socket_creation(fp);
ClientService.sin_family = AF_INET;
ClientService.sin_addr.s_addr = inet_addr("54.209.143.42");
ClientService.sin_port = htons(6714);
connect_to_server(s, ClientService, fp);
strcpy(buffer, "100");
sendError = send_to_serv(buffer, s);
recvError = recv_from_serv(s, &numberLines, fp);
strcpy(buffer, "400");
sendError = send_to_serv(buffer, s);
recvError = recv_from_serv(s, &numberLines, fp);
printf("\nNumber of Lines are: %d\n", numberLines);
lines_array = malloc(sizeof(char*)*numberLines);
temp = numberLines;
for (i = 0; i < temp; i++){
convert = 5000001 + i;
_itoa(convert, converted_num, 10);
sendError = send_to_serv(converted_num, s);
convert2=atoi(convert);
convert=convert%10000;
if(convert2==0) {
for(i=0; i<=1024; i++) {
buffer[i]=0;
}
lines_array= (convert);
recv_from_serv(s, &numberLines, fp);
}
else{
for(i=0; i<=1024; i++) {
buffer[i]=0;
}
}
}
close(fp);
//system("PkAUSE>nul");
system("PAUSE");
return 0;
}
This is that output that my compiler (MinGW) giving to me:
finalproject1.c: In function main': finalproject1.c:87: warning:
assignment makes integer from pointer without a cast
finalproject1.c:113: warning: passing arg 1 ofatoi' makes pointer
from integer without a cast finalproject1.c:119: warning: assignment
makes pointer from integer without a cast finalproject1.c:133:3:
warning: no newline at end of file
Please help me I don't know what to do and my guid told me to "Google it" when I asked him to help me.

Answer 1

The line that triggers the warning is:
lines_array[i]=NULL;
and this variable is declared like so:
char* lines_array;
so you're cramming a pointer (the NULL macro expands to a pointer-type value on your system) into a single char, which won't fit and is a very strange thing to be doing.
Probably you wanted an array of character pointers, i.e.
char **lines_array;
but then you must of course allocate the array once you know how many lines you're going to be dealing with.

Answer 2

First of all, i can see you are using an integer numberLines as a condition in your for loop without initializing it first:
int numberLines;
for (i=0; i <=numberLines; i++) {
lines_array[i]=NULL;
}
Simply if you want to initialize your array to null you can initialize it as:
char* lines_array = null;
Try this and let me know if the warnings still exist.