Compilare: user.cpp: In function ‘int main()’: user.cpp:72:19: warning: unused variable ‘k’ [-Wunused-variable] int n,q,i,j,c,k,nr,ok; ^ user.cpp:73:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d\n",&n,&q); ^ user.cpp:75:29: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets (s,100000,fin); ^ user.cpp:94:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&c,&i,&j); ^