如何将一个13位数字字符串转换成13位的数字整型啊,求问 挥洒 帕秋莉糕 12 #include<stdio.h>unsigned long long my_atoi(char *p){unsigned long long num = 0;while (*p)num = 10 * num + (*(p++) - '0');return num;}int main(void){char str[] = "1234567890123";unsigned long long ...