Compilare: user.c: In function ‘main’: user.c:27:3: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] na=strlen(a)-1;//am pus -1 pt ca fgets memoreaza si '\n' ^ user.c:27:6: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default] na=strlen(a)-1;//am pus -1 pt ca fgets memoreaza si '\n' ^ user.c:25:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(a, MAXN+1, fin); ^ user.c:26:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(b, MAXN+1, fin); ^