3 replies to this topic

[Sinipull]

Okay, so i need to get character array from std input with scanf. The character array size isn't specified and must hold whatever sized input (computer memory is the limit...). Any ideas?

Edited by Sinipull, 01 December 2009 - 06:18 AM.

[psam]

char* line;
char c;
int i=0;

line=calloc(1, sizeof(char));
do
{
    c=getchar();
    line=realloc(line, sizeof(char)*(i+1));
    line[i]=c;
    i++;
}
while(c!='\n');
line[i]='\0';

Something like this. I didn't test it. ;D
Obviously you can use scanf instead of getchar().

[dargueta]

Quote

line=realloc(line, sizeof(char)*(i+1));

I would recommend something like the following:

char *tmp = realloc(line, sizeof(char)*(i+1));
if(!tmp) {
    //reallocation failed
    free(line);
    printf("Out of memory!\n");
}
else
    line = tmp;

[Sinipull]

Thanks! Helps me a lot.