Compilare: user.cpp: In function ‘void suma(char*, char*)’: user.cpp:17: warning: comparison between signed and unsigned integer expressions user.cpp:24: warning: comparison between signed and unsigned integer expressions user.cpp:39: warning: array subscript has type ‘char’ user.cpp: In function ‘void produs(char*, int)’: user.cpp:56: warning: array subscript has type ‘char’ user.cpp: In function ‘int main()’: user.cpp:109: warning: array subscript has type ‘char’ user.cpp:74: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:78: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result