#include<stdio.h>
long fun(char s)
int main()
{
long m;
char s[50];
scanf(“%s”,s);
m=fun(s);
printf(“ld”,m);
return 0;
}
long fun(char s)
{
int i,t;
long sum=0;
for(i=0;s[i];i++)
{
if(s[i]<=”9″)
t=s[i]-“0”;
else
t=s[i]-“a”+10;
sum=sum*16+t;
}
return sum;
}
哪里不对啊?
long fun(char s)
int main()
{
long m;
char s[50];
scanf(“%s”,s);
m=fun(s);
printf(“ld”,m);
return 0;
}
long fun(char s)
{
int i,t;
long sum=0;
for(i=0;s[i];i++)
{
if(s[i]<=”9″)
t=s[i]-“0”;
else
t=s[i]-“a”+10;
sum=sum*16+t;
}
return sum;
}
哪里不对啊?
解决方案
22
#include<stdio.h> long fun(char *s); int main() { long m; char s[50]; scanf("%s",s); m=fun(s); printf("%ld\n",m); return 0; } long fun(char *s) { int i,t; long sum=0; for(i=0;s[i];i++) { if(s[i]<="9") t=s[i]-"0"; else t=s[i]-"a"+10; sum=sum*16+t; } return sum; }
3
sum=sum*16+t;这行代码有什么意义吗?
4
long fun(char s) 参数不是char,应该是char*
9
仅供参考:
#include <stdio.h> #include <stdlib.h> #include <string.h> #include <locale.h> int main() { int i,v; char bs[33]; char b[33]; char hs[9]; char h[9]; char s[4]; char *e; // 十进制整数转二进制串; i=1024; ltoa(i,b,2); sprintf(bs,"%032s",b); printf("i=%d,bs=%s\n",i,bs); // 十进制整数转十六进制串; i=1024; ltoa(i,h,16); sprintf(hs,"%08s",h); printf("i=%d,hs=%s\n",i,hs); // 十六进制字符串转成十进制数 strcpy(hs,"00000400"); sscanf(hs,"%x",&i); printf("hs=%s,i=%d\n",hs,i); // 二进制字符串转化为十六进制字符串; strcpy(bs,"00000000000000000000010000000000"); i=strtol(bs,&e,2); ltoa(i,h,16); sprintf(hs,"%08s",h); printf("bs=%s,hs=%s\n",bs,hs); // 二进制字符串转化为十进制数; strcpy(bs,"00000000000000000000010000000000"); i=strtol(bs,&e,2); printf("bs=%s,i=%d\n",bs,i); // 十六进制字符串转成二进制串 strcpy(hs,"00000400"); sscanf(hs,"%x",&i); ltoa(i,b,2); sprintf(bs,"%032s",b); printf("hs=%s,bs=%s\n",hs,bs); // ASC\GBK字符串转十六进制串 strcpy(s,"a汉"); i=0; while (1) { if (0==s[i]) break; sprintf(hs+i*2,"%02X",(unsigned char)s[i]); i++; } setlocale(LC_ALL,"chs"); printf("s=%s,hs=%s\n",s,hs); // 十六进制字符串转成汉字(GBK)及字符(ASC) strcpy(hs,"61BABA"); i=0; while (1) { if (1!=sscanf(hs+i*2,"%2x",&v)) break; s[i]=(char)v; i++; } s[i]=0; printf("hs=%s,s=%s\n",hs,s); return 0; } //i=1024,bs=00000000000000000000010000000000 //i=1024,hs=00000400 //hs=00000400,i=1024 //bs=00000000000000000000010000000000,hs=00000400 //bs=00000000000000000000010000000000,i=1024 //hs=00000400,bs=00000000000000000000010000000000 //s=a汉,hs=61BABA //hs=61BABA,s=a汉
4
数组学过没?
5
指针没学?
把long fun(char *s)改成long fun(char s[])就行
4
本人是刚开始学者 不知道什么是char* 能不能帮忙该个不带*的?、
原因是他们是完全不同的类型,一个是指针,一个不是