expresie1.cpp: In function 'int main()': expresie1.cpp:89: warning: name lookup of 'i' changed expresie1.cpp:9: warning: matches this 'i' under ISO standard rules expresie1.cpp:84: warning: matches this 'i' under old rules 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:80: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result