/* Convert a string to a floating-point number. */ extern double atof (const char *__nptr) __THROW __attribute_pure__ __nonnull ((1)) __wur; /* Convert a string to an integer. */ extern int atoi (const char *__nptr) __THROW __attribute_pure__ __nonnull ((1)) __wur; ...
有一个UIntToStr来帮助将UINT64转换为string,但无法将64位整数转换为无符号值,即字符串。这意味着,使用RTL不能用十进制或十六进制表示大于2**63的整数值。这通常不是什么大问题,但用户需要输入一个值,作为一个无符号整数,它必须作为64位无符号整 浏览4提问于2011-05-20得票数 10 回答已采纳 5回答 ...
str = fcvt(num, ndigits, &dec-pl, &sign); /* Convert the float to a string. * / printf("Original number; %f\n" , num) ; /* Print the original floating-point value. * / printf ("Converted string; %s\n",str); /* Print the converted string's value. * / printf ("Decimal ...
# include <stdio. h># include<stdlib. h>voidmain (void) {doublenum =12345.678;char*sir;intdec_pl, sign, ndigits =3;/*Keep 3 digits of precision.*/str= fcvt(num, ndigits, &dec-pl, &sign);/*Convert the float to a string.*/printf("Original number; %f\n", num) ;/*Print the...
从string转换为其它类型,定义多个重载函数。 #include<strstream>template<classT> stringconvertToString(constT val){ string s; std::strstream ss; ss << val; ss >> s;returns; }intconvertStringToInt(conststring &s){intval; std::strstream ss; ...
static void Main(string[] args){ //提示用户输入一个数字接收并且向控制台打印用户输入的这个数字的2倍 Console.WriteLine("请输入一个数字");string strNumber = Console.ReadLine();//将用户输入的字符串转换成int或者double类型 double number = Convert.ToDouble(Console.ReadLine());Console.WriteLine(number...
convert a string to an unsigned long integer(把输入的字符串转换成数字). strtoul() 会扫描参数nptr 字符串,跳过前面的空白字符(例如空格,tab缩进等,可以通过isspace() 函数来检测),直到遇上数字或正负符号才开始做转换,再遇到非数字或字符串结束时('\0')结束转换,并将结果返回。
Internally NUMVAL uses long-precision floating calculations to convert the given number to the output, so if the argument toNUMVAL,NUMVAL-C, or NUMVAL-F has more than 15 digits, it is recommended that you specify theARITH(EXTEND)compiler option so that an extended-precision function result ...
* / str = fcvt(num, ndigits, &dec-pl, &sign); /* Convert the float & 9、#160; to a string. * / printf("Original number; %fn" , 10、num) ; /* Print the original &# 11、160; floating-point 12、0; value. * / printf ("Converted string; %sn",str); /* Print the...
pcString); - while(*pcString) - { - // 首先搜寻非%核字符串结束字符 - for(ulIdx = 0; (pcString[ulIdx] != '%') && (pcString[ulIdx] != '\0'); ulIdx++) - { } - UARTwrite(pcString, ulIdx); - - pcString += ulIdx; - if(*pcString == '%') - { - pcString++; ...