Compilare: user.c: In function ‘readVector’: user.c:8:5: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] return strlen(v); ^ user.c:8:12: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default] return strlen(v); ^ user.c:7:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",v); ^