Compilare: user.cpp: In function ‘int main()’: user.cpp:22:13: warning: unused variable ‘y’ [-Wunused-variable] int l,x,y; ^ user.cpp:23:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&t); ^ user.cpp:26:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s\n",n); ^ user.cpp:37:60: warning: array subscript is above array bounds [-Warray-bounds] else if(x >= 60 && x < 80) fprintf(g,"%d\n",(c[x-20]+2)%10); ^ user.cpp:38:61: warning: array subscript is above array bounds [-Warray-bounds] else if(x >= 80 && x < 100) fprintf(g,"%d\n",(c[x-20]+6)%10); ^