Question

im tryin to send a 2d array in simple socket program..but this only sends the first row and never anything beyond that/….what is the problem here… ?

server part …

struct sockaddr_in clienta,servera;
int s ;
s = socket(AF_INET,SOCK_STREAM,0);
servera.sin_family = AF_INET;
servera.sin_port = htons(3386);
servera.sin_addr.s_addr = htonl(INADDR_ANY);
bind(s,(struct sockaddr *)&servera,sizeof(servera));
listen(s,1);
int news;
int len = sizeof(clienta);
printf("waiting for connection");
news = accept(s,(struct sockaddr *)&clienta , &len);
printf("\n received connection");
int c[3][3];
recv(news, &c,sizeof(c),0);
int d = sizeof(c);
int i=0,j=0;
for(;i<=2;i++)
    for(;j<=2;j++)
        printf("\n %i,%i,%i",i,j,c[i][j]);
printf("\n %i",c[1][0]);

here is the client program

    struct sockaddr_in servera;
int s ;
s = socket(AF_INET,SOCK_STREAM,0);
servera.sin_family = AF_INET;
servera.sin_port = htons(3386);
servera.sin_addr.s_addr = inet_addr("127.0.0.1");
connect(s,(struct sockaddr *)&servera, sizeof(servera));
int b[3][3];
int i=0,j=0;
for(;i<3;i++)
    for(;j<3;j++)
        b[i][j]=4;

printf("connected");
send(s,&b,sizeof(b),0);
int l = sizeof(b);

Answer 1

You know what these:

for(;i<=2;i++)
    for(;j<=2;j++)
        printf("\n %i,%i,%i",i,j,c[i][j]);

and

for(;i<=2;i++)
    for(;j<=2;j++)
       printf("\n %i,%i,%i",i,j,c[i][j]);

do? j is initialized just once (:

So, once j gets 3 on i = 0, when i = 1 and i = 2 j is still 3 and the second for is not executed, that’s why you send only the first row.