Compilare: user.c: In function ‘main’: user.c:34:13: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘char *’ [-Wformat=] fscanf(fin, "%d" ,&mat[i][j]); ^ user.c:31:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d" ,&n,&m); ^ user.c:34:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" ,&mat[i][j]); ^ user.c:37:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" ,&k); ^ user.c:39:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d" ,&l1,&c1,&l2,&c2,&val); ^