c语言实现的大数四则运算

c语言实现的大数四则运算,加减乘除，支持负数 printf("\n\n\n"); printf("\t\t\t**************************************\n"); printf("\t\t\t**\n"); printf("\t\t\t*1.大整数的加法*\n"); printf("\t\t\t*2.大整数的减法*\n"); printf("\t\t\t*3.大整数的乘法*\n"); printf("\t\t\t*4.大整数进制转换*\n"); printf("\t\t\t*5.帮助?*\n"); printf("\t\t