porumb1.cpp: In function 'int pow(int)': porumb1.cpp:8: warning: unused variable 'i' porumb1.cpp: In function 'int pow1(int)': porumb1.cpp:19: warning: unused variable 'i' porumb1.cpp: In function 'int pow2(int)': porumb1.cpp:30: warning: unused variable 'i' porumb1.cpp:30: warning: unused variable 'p' porumb1.cpp: In function 'int main()': porumb1.cpp:42: warning: unused variable 'r' porumb1.cpp:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result