Compilare: user.cpp: In function ‘int prim(int)’: user.cpp:29: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:31: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:33: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:25: warning: unused variable ‘random’ user.cpp: In function ‘int main()’: user.cpp:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:45: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result