编写程序把一个保存有二进制小数的字符数组转换为浮点数
编写程序把一个保存有二进制小数的字符数组转换为浮点数
#include stdio.h>
#include stdlib.h>
const int MAX=10;
float convert(const char* str)
{
float sum1 = 0.0;
float sum2 = 0.0;
int i = 0;
int idx = 0;
int len = strlen(str);
while(str[idx]!='.')
idx++;
printf("len is %d, index is %d\n", len, idx);
i = idx;
while(i--)
sum1 = sum1*2 + (str-'0');
i = len-1;
while(i>idx)
{
sum2 = (sum2 + (str-'0'))*0.5;
i--;
}
printf("sum1 is %f, sum2 is %f\n", sum1, sum2);
return (sum1+sum2);
}
int main(int argc, char *argv[])
{
float ret = 0.0;
char str[MAX];
while(1)
{
printf("Please input the str:\n");
scanf("%s", str);
ret = convert(str);
printf("%f\n",ret);
}
system("PAUSE");
return 0;
}