Compilare: main.cpp: In function 'Expresie solve()': main.cpp:18:25: warning: NULL used in arithmetic [-Wpointer-arith] while( *p!='=' && *p!=NULL ) ^~~~ main.cpp: In function 'int main()': main.cpp:66:23: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[255]' [-Wformat=] scanf( "%s\n", &s ); ^ main.cpp:57:39: 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 ); ^ main.cpp:58:41: 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 ); ^ main.cpp:62:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d\n", &n ); ^ main.cpp:66:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%s\n", &s ); ^