?? convert.c
字號(hào):
#include "convert.h"
#include <ctype.h>
int stoi(char *s,int radix)
{
char *p = s;
int val = 0;
if ( radix==8 )
// oct
{
p++; // skip leading '0'
while (*p)
{
val = val * radix + (*p-'0');
p++;
}
}
else if (radix==16)
// hex
{
p++;p++;// skip leading '0x'
while (*p)
{
if ( isdigit(*p) )
val = val * radix + (*p-'0');
else
val = val * radix + (tolower(*p)-'a') + 10;
p++;
}
}
else
// dec
{
while (*p)
{
val = val * radix + (*p-'0');
p++;
}
}
return val;
}
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