Compilare: user.c: In function ‘main’: user.c:42:18: warning: left-hand operand of comma expression has no effect [-Wunused-value] for(i=0, j=0; i<M, j<N; i++, j++){ ^ user.c:24:43: warning: unused variable ‘temp’ [-Wunused-variable] int i, j, M, N, palPerCol=0, palPerRow=0, temp; ^ user.c:29:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &M); ^ user.c:30:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &N); ^ user.c:34:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%c", &matrix[i][j]); ^ user.c:36:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%c", &matrix[i][j]); ^