Compilare: main.c: In function 'main': main.c:9:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:10:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &l ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:28:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &a ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:29:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &b ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:32:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &a ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:33:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &b ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:38:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &a ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:39:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &b ); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:62:5: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf( fout, "%d", m[x][y] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:62:5: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]