Compilare: user.cpp: In function ‘int main()’: user.cpp:27:9: warning: unused variable ‘li’ [-Wunused-variable] int li = 1,ls = k-1,power; ^ user.cpp:27:16: warning: unused variable ‘ls’ [-Wunused-variable] int li = 1,ls = k-1,power; ^ user.cpp:27:25: warning: unused variable ‘power’ [-Wunused-variable] int li = 1,ls = k-1,power; ^ user.cpp: In function ‘void read()’: user.cpp:48:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d", &n, &k); ^ user.cpp:51:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d ",&friends[i]); ^ user.cpp:53:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &m); ^ user.cpp:63:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d", &x, &y); ^ user.cpp:64:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d", &T[x][y], &W[x][y]); ^