Compilare: user.c: In function ‘cit’: user.c:11:11: warning: implicit declaration of function ‘blanc’ [-Wimplicit-function-declaration] blanc(); ^~~~~ user.c:14:25: warning: implicit declaration of function ‘isdigit’ [-Wimplicit-function-declaration] while(conb<size&&isdigit(buffer[conb])==1){ ^~~~~~~ user.c: At top level: user.c:22:12: warning: conflicting types for built-in function ‘isdigit’ inline int isdigit(char a){ ^~~~~~~ user.c: In function ‘isdigit’: user.c:23:14: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(a>='0'&&a<='9'||a=='-') ~~~~~~^~~~~~~~ user.c: At top level: user.c:27:13: warning: conflicting types for ‘blanc’ inline void blanc(){ ^~~~~ user.c:11:11: note: previous implicit declaration of ‘blanc’ was here blanc(); ^~~~~ user.c: In function ‘main’: user.c:44:5: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,size,fi); ^~~~~~~~~~~~~~~~~~~~~~~