Compilare: user.cpp: In function ‘void readPR()’: user.cpp:56:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &k); ^ user.cpp:61:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n[i], &a[i]); ^ user.cpp: In function ‘int main()’: user.cpp:96:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp: In function ‘void compMX()’: user.cpp:86:18: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] mul(M, x); ^