Eroare de compilare: user.c:1:18: error: cstdio: No such file or directory user.c:2:17: error: cmath: No such file or directory user.c: In function ‘main’: user.c:15: warning: implicit declaration of function ‘freopen’ user.c:15: error: ‘stdin’ undeclared (first use in this function) user.c:15: error: (Each undeclared identifier is reported only once user.c:15: error: for each function it appears in.) user.c:17: warning: implicit declaration of function ‘scanf’ user.c:17: warning: incompatible implicit declaration of built-in function ‘scanf’ user.c:24: error: ‘stdout’ undeclared (first use in this function) user.c:31: error: expected ‘)’ before ‘b’ user.c:31: warning: implicit declaration of function ‘pow’ user.c:31: warning: incompatible implicit declaration of built-in function ‘pow’ user.c:40: warning: incompatible implicit declaration of built-in function ‘pow’ user.c:46: warning: implicit declaration of function ‘printf’ user.c:46: warning: incompatible implicit declaration of built-in function ‘printf’ user.c:50: warning: implicit declaration of function ‘fclose’