七. 类型转换
● 隐式类型转换
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隐式类型转换 implicit type conversions |
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#include<iostream> using namespace std; void main() { double result; char a='k'; //k的ASCII码为107 int b=10; float e=1.515; result=(a+b)-e; //char转换为int,然后int转换为float printf("%f\n",result); } |
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● 显式类型转换
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显式类型转换explicit type conversion |
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#include<iostream.h> int main() { float z=7.56, fractionPart; int integerPart; integerPart=int(z); fractionPart=z-(int)z; cout<<integerPart<<endl; cout<<fractionPart<<endl; return 0; } |
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type_name (expression) //C++ cast notation (type_name) expression //C cast notation ※An expression consists of a combination of operators and operands. (An operand is what an operator operates on.) The simplest expression is a lone operand, and you can build in complexity from there. E.g.: 4 -6 4+21 a*(b + c/d)/20 q = 5*2 x = ++q % 3 q > 3 |
