tren.cpp: In function 'long long int tren(long long int*, long long int, long long int)': tren.cpp:16: warning: unused variable 't3' tren.cpp:16: warning: unused variable 't4' tren.cpp:16: warning: unused variable 't5' tren.cpp:16: warning: unused variable 't6' tren.cpp: In function 'int main()': tren.cpp:58: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result tren.cpp:63: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result tren.cpp: In function 'long long int tren(long long int*, long long int, long long int)': tren.cpp:55: warning: control reaches end of non-void function