int convertToInteger(float num, char method) { switch (method) { case 'r': return round(num); case 'c': return ceil(num); case 'f': return floor(num); case 't': return trunc(num); default: return (int)num; } } int main() { float num = 3.14; int result; result = conver...
// to convert float to int without floating point operations int ownFloatToInt(int floatBits, int scaler) { int sign = (floatBits >> (EXPONENT_LENGTH + MANTISSA_LENGTH)) & 1; int exponent = (floatBits >> MANTISSA_LENGTH) & ((1 << EXPONENT_LENGTH) - 1); int mantissa = (floatBit...
4. Convert.ToInt32 该方式不仅可以将字符串类型转换为int,还可以将其他的类型转换为int。变量若为object或string类型,当其值为Nul时,会传回0,不会造成程序错误,但是若此string类型的值为string.Empty,转换成int时,程序仍会出错。 该方式对于float类型做四舍五入。 该方式同强制类型转换一样在处理char类型的...
Truncating conversionmeans that any fractional part is discarded, so that e.g. 3.9 is converted to 3. Such a conversion is the default floating to integer conversion in C in the sense that it is applied whenever a value of a floating-point type (float, double or long double) is to be ...
int dec_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 original
short a=1;int b=6_666_666;long c=1L;// long类型,数字需要带 Lchar e='1';float f=1.0F;double g=1.0;byte h=1; C# 和 JAVA 中默认整型是 int,浮点型是 double。 因此float 要带 F。 C# 和 JAVA 中使用的进制表示法,跟 C 语言一致。
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@@ lua_number2integer is a macro to convert lua_Number to lua_Integer. ** CHANGE them if you know a faster way to convert a lua_Number to ** int (with any rounding method and without throwing errors) in your ** system. In Pentium machines, a naive typecast from double to int ...
/* Convert a string to a long long integer. */ __extension__ extern long long int atoll (const char *__nptr) __THROW __attribute_pure__ __nonnull ((1)) __wur; #endif #ifdef __USE_ISOC99 /* Likewise for `float' and `long double' sizes of floating-point numbers. */ ...
string num="1234560";int a=int.Prase(num);注意：num中只能出现数字且开头不为0，否则会出错 如果是小数就用 string num1="3.1415926";float bfloat.prase(num1);