Compilare: user.c: In function ‘main’: user.c:5:7: warning: ignoring return value of ‘fopen’, declared with attribute warn_unused_result [-Wunused-result] fopen("adunare.in", "r"); ^ user.c:11:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%d", &numar1); ^ user.c:12:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file, "%d", &numar2); ^ user.c:14:8: warning: ignoring return value of ‘fopen’, declared with attribute warn_unused_result [-Wunused-result] fopen ("adunare.out", "w"); ^