1.2 变量与算术表达式
使用公式$°C= \frac{5}{9}(°F-32)$打印下列华氏温度与摄氏温度的对照表：
0 -1
20 -6
40 4
60 15
80 26
100 37
120 48
140 60
160 71
180 82
200 93
220 104
240 115
260 126
280 137
300 148
代码:
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| #include <stdio.h>
int main()
{
int celsius;
int lower,upper,step,fahr;
lower = 0;
upper = 300;
step = 20;
fahr = lower;
printf("%10s\t%10s\n","华氏温度","摄氏温度");
while(fahr <= upper)
{
celsius = 5 * (fahr - 32) / 9;
printf("%10d\t%10f\n",fahr,celsius);
fahr = fahr + step;
}
}
|
注意:此处不用(5/9)*(fahr-32)是因为5除以9先会转化成int型，所以最后再除以9,最好是把温度定义成float型
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| #include <stdio.h>
int main()
{
float celsius;
int lower,upper,step,fahr;
lower = 0;
upper = 300;
step = 20;
fahr = lower;
printf("%10s\t%10s\n"," 华氏温度","摄氏温度");
for(; fahr <= 300; fahr += step)
{
celsius = 5.0 * (fahr - 32) / 9.0;
printf("%10d\t%10f\n",fahr,celsius);
}
}
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