cai.cpp: In function 'int main()': cai.cpp:81: warning: suggest parentheses around comparison in operand of '&' cai.cpp:91: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[51]' cai.cpp:91: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[51]' cai.cpp:71: warning: unused variable 'pp' cai.cpp:71: warning: unused variable 'nr2' cai.cpp:71: warning: unused variable 'min' cai.cpp:69: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cai.cpp:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cai.cpp:72: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cai.cpp:91: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result