13．char p[][20]={“get”,”put”,”out”};表达式strlen(p[0])+strlen(p

strlen计算的是字符串的字符个数不包括\0,char p[][20]={“get”,”put”,”out”};
即p[0]='g','e','t','\0',p[1]='p','u','t','\0' p[2]='o','u','t','\0'因此等于3+3+3=9