简单的字符串处理,虽然我这个菜鸟实现了好久好久。

#include <stdio.h>
#include <math.h>
#include<string.h>
int main()
{
char s[50];
while(gets(s)!=EOF)
{
int kong=0,jia=0,i,n,a=0,b=0;
n=strlen(s);
for(i=n-5;i>=0;i--)
{
if(s[i]==' ') kong++;
if(s[i]=='+') {jia++;kong=-1;}
if((s[i]=='o')&&(s[i+1]=='n')&&(jia==0)) a=a+1*pow(10,kong);
if((s[i]=='t')&&(s[i+1]=='w')&&(jia==0)) a=a+2*pow(10,kong);
if((s[i]=='t')&&(s[i+1]=='h')&&(jia==0)) a=a+3*pow(10,kong);
if((s[i]=='f')&&(s[i+1]=='o')&&(jia==0)) a=a+4*pow(10,kong);
if((s[i]=='f')&&(s[i+1]=='i')&&(jia==0)) a=a+5*pow(10,kong);
if((s[i]=='s')&&(s[i+1]=='i')&&(jia==0)) a=a+6*pow(10,kong);
if((s[i]=='s')&&(s[i+1]=='e')&&(jia==0)) a=a+7*pow(10,kong);
if((s[i]=='e')&&(s[i+1]=='i')&&(jia==0)) a=a+8*pow(10,kong);
if((s[i]=='n')&&(s[i+1]=='i')&&(jia==0)) a=a+9*pow(10,kong);
if((s[i]=='o')&&(s[i+1]=='n')&&(jia!=0)) b=b+1*pow(10,kong);
if((s[i]=='t')&&(s[i+1]=='w')&&(jia!=0)) b=b+2*pow(10,kong);
if((s[i]=='t')&&(s[i+1]=='h')&&(jia!=0)) b=b+3*pow(10,kong);
if((s[i]=='f')&&(s[i+1]=='o')&&(jia!=0)) b=b+4*pow(10,kong);
if((s[i]=='f')&&(s[i+1]=='i')&&(jia!=0)) b=b+5*pow(10,kong);
if((s[i]=='s')&&(s[i+1]=='i')&&(jia!=0)) b=b+6*pow(10,kong);
if((s[i]=='s')&&(s[i+1]=='e')&&(jia!=0)) b=b+7*pow(10,kong);
if((s[i]=='e')&&(s[i+1]=='i')&&(jia!=0)) b=b+8*pow(10,kong);
if((s[i]=='n')&&(s[i+1]=='i')&&(jia!=0)) b=b+9*pow(10,kong);
}
if(a==0&&b==0) break;
else {printf("%d\n",a+b);}
}
return 0;
}
/*
one + two =
three four + five six =
zero seven + eight nine =
zero + zero =
*/
大致就是从后往前读,以空格为标志每碰到一个乘10就好了,然后计数加号的个数 出现了加号代表到了下一个数字了。两个数字相加输出就好了