Compilare: user.c: In function ‘cit’: user.c:21:25: warning: implicit declaration of function ‘isdigit’ [-Wimplicit-function-declaration] while(conb<size&&isdigit(buffer[conb])==1){ ^~~~~~~ user.c:25:8: warning: implicit declaration of function ‘blanc’ [-Wimplicit-function-declaration] blanc(); ^~~~~ user.c: At top level: user.c:28:12: warning: conflicting types for built-in function ‘isdigit’ inline int isdigit(char a){ ^~~~~~~ user.c:33:13: warning: conflicting types for ‘blanc’ inline void blanc(){ ^~~~~ user.c:25:8: note: previous implicit declaration of ‘blanc’ was here blanc(); ^~~~~ user.c: In function ‘main’: user.c:47:5: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,size,fi); ^~~~~~~~~~~~~~~~~~~~~~~