Compilare: main.cpp: In function 'int main()': main.cpp:28:9: warning: unused variable 'tests' [-Wunused-variable] int tests, a, b, c, rez1, rez2 , d; ^~~~~ main.cpp:28:19: warning: unused variable 'b' [-Wunused-variable] int tests, a, b, c, rez1, rez2 , d; ^ main.cpp:28:22: warning: unused variable 'c' [-Wunused-variable] int tests, a, b, c, rez1, rez2 , d; ^ main.cpp:26:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.in", "r", stdin); ^ main.cpp:27:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.out", "w", stdout); ^ main.cpp:30:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a,&n); ^