expresie1.cpp: In function 'int solve(int&, int)': expresie1.cpp:70: warning: unused variable 'lenn' expresie1.cpp:19: warning: unused variable 'chr' expresie1.cpp: In function 'int main()': expresie1.cpp:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result expresie1.cpp:78: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result expresie1.cpp:79: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result expresie1.cpp: In function 'int solve(int&, int)': expresie1.cpp:26: warning: 'local' may be used uninitialized in this function /tmp/ccrkU7z4.o: In function `main': expresie1.cpp:(.text+0x8b): warning: the `gets' function is dangerous and should not be used.