Compilare: user.cpp: In function ‘void ecuati1(char*)’: user.cpp:14:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<strlen(k)) ^ user.cpp: In function ‘void ecuati2(char*)’: user.cpp:44:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<strlen(k)) ^ user.cpp: In function ‘int main()’: user.cpp:73:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.in", "r", stdin); ^ user.cpp:74:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.out", "w", stdout); ^ user.cpp:77:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:81:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", s); ^