Compilare: user.c: In function ‘main’: user.c:8:17: warning: variable ‘x’ set but not used [-Wunused-but-set-variable] int i=0,j=0,x,y=100,z=100; ^ user.c:42:32: warning: ignoring return value of ‘realloc’, declared with attribute warn_unused_result [-Wunused-result] realloc(b[i],sizeof(char)*z); ^ user.c:68:24: warning: ignoring return value of ‘realloc’, declared with attribute warn_unused_result [-Wunused-result] realloc(b,sizeof(char*)*y); ^