soricel3.cpp: In function 'void Citire(int, int)': soricel3.cpp:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result soricel3.cpp:19: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result soricel3.cpp: In function 'void show(int, int)': soricel3.cpp:35: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result soricel3.cpp: In function 'int main()': soricel3.cpp:123: warning: unused variable 'k' soricel3.cpp:124: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result soricel3.cpp: In function 'int Inv(int)': soricel3.cpp:68: warning: control reaches end of non-void function