赋值转换

Posted 2020-09-07

#include<stdio.h>
int main()
{
    char c = ‘a’;
    int a = 321, b, i;
    unsigned m = 65535, n;
    float x = 2.5, y;
    double d = 12345678.987;
    printf(“c=%c,   a=%d,   m=%u,   x=%f,   d=%f\n”, c, a, m, x, d);

    c = a;
/*整型转到字符型,整型变量a的值321存放到字符型变量c,只保留低八位01000001,即十进制数65*/

    b = x;
//单精度转到整型,单精度变量x的值2.5存放到整型变量b,只保留整数部分2

    y = a;
/*整形转到单精度,整型变量a的值321存放到单精度变量y,数值321不变,但以实数形式存储到变量中*/

    x = d;
/*双精度转到单精度,双精度变量d的值12345678.987,小数部分四舍五入处理进到整数部分,再以实数形式储存到变量中*/

    i = m;
//无符号整形转到整型,直接转

    n = -1;
//负数赋值给无符号整型,-1的补码4294967295存入无符号整型变量

    printf(“c=%c,   b=%d,   y=%f,   x=%f,   i=%d,   n=%u\n”, c, b, y, x, i, n);

    getchar();
    return 0;
}