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帮我看看为什么RUNTIME ERROR!!#include <stdio.h>
#include <string.h>
int main()
{
char str[51][101];
char temp[51];
int sum[51];
int k,m,i,j,n,t;
scanf("%d%d",&n,&m);
for (i=0;i<m;i++) sum[i]=0;
for (k=0;k<m;k++)
{
scanf("%s",&str[k]);
for (i=0;i<n;i++)
for (j=i;j<n;j++)
if (str[k][i]>str[k][j]) sum[k]++;
}
for (i=0;i<m;i++)
for (j=i+1;j<m;j++)
if (sum[i]>sum[j])
{
strcpy(temp,str[i]);
strcpy(str[i],str[j]);
strcpy(str[j],temp);
t=sum[i];
sum[i]=sum[j];
sum[j]=t;
}
for (i=0;i<m;i++)
printf("%s\n",str[i]);
return 0;
}
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