spioni1.cpp: In function 'int main()': spioni1.cpp:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result spioni1.cpp:54: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result spioni1.cpp:55: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result spioni1.cpp:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result spioni1.cpp:57: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result spioni1.cpp:62: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result spioni1.cpp: In function 'void spioni(int, char*)': spioni1.cpp:25: warning: array subscript is above array bounds spioni1.cpp:42: warning: array subscript is above array bounds spioni1.cpp:15: warning: array subscript is above array bounds spioni1.cpp:43: warning: array subscript is above array bounds spioni1.cpp:25: warning: 'b' may be used uninitialized in this function spioni1.cpp:35: note: 'b' was declared here