Compilare: user.c: In function ‘init’: user.c:70: warning: format ‘%f’ expects type ‘float *’, but argument 2 has type ‘double *’ user.c:70: warning: format ‘%f’ expects type ‘float *’, but argument 3 has type ‘double *’ user.c:70: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c: In function ‘main’: user.c:79: warning: unused variable ‘d’ user.c:79: warning: unused variable ‘b’ user.c:79: warning: unused variable ‘a’ user.c:79: warning: unused variable ‘c’ user.c:80: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:81: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:82: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c: In function ‘caut_bin’: user.c:65: warning: control reaches end of non-void function user.c: In function ‘polar’: user.c:26: warning: control reaches end of non-void function