Compilare: user.c: In function ‘main’: user.c:39:5: warning: implicit declaration of function ‘close’ [-Wimplicit-function-declaration] close(in); ^ user.c:32:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &lineC); ^ user.c:33:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &colC); ^ user.c:36:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &array[i][j]); ^