?? atof.c
字號:
//#include <ctype.h>
extern float rvalue;
void atoff(char s[])
{
float val, power;
int i, sign;
for (i = 0; s[i] == ' '; i++)
;
sign = (s[i] == '-') ? -1 : 1;
if (s[i] == '+' || s[i] == '-')
i++;
for (val = 0.0; s[i] <= '9' && s[i] >= '0'; i++)
val = 10.0 * val + (s[i] - '0');
if (s[i] == '.')
i++;
for (power = 1.0; s[i] <= '9' && s[i] >= '0'; i++) {
val = 10.0 * val + (s[i] - '0');
power *= 10.0;
}
rvalue = sign* val /power;
}
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