Question

自学C语言 如下代码编译通过，可是运行时弹出：程序已停止工作。错哪了？

#include <stdio.h>
int main()
{
int a,b,c,d,e,f,g,i,len;
char instr[100];
FILE * fp;
fp=("d:\\xr1.txt","a");
scanf ("%d%d%d%d%d%d%d%s",&a,&b,&c,&d,&e,&f,&g,instr);
if (a%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (b%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (c%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (d%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (e%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (f%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (g%2==0)
fprintf(fp,"O ");
else
fprintf(fp,"X ");

len = strlen(instr);
for (i=0;i<len;i+=2)
if((instr[i]-'0')+(instr[i+1]-'0') <= 5)
fprintf(fp,"O");
else
fprintf(fp,"X");
fputc('\n',fp);
fclose(fp);
}

Answer 1

#include <stdio.h>
int main()
{
int a,b,c,d,e,f,g,i,len;
char instr[100];
FILE * fp;
fp=("d:\\xr1.txt","rw+");
if(fp==NULL)
{
printf("error!\n");
exit(0);
}
scanf ("%d%d%d%d%d%d%d%s",&a,&b,&c,&d,&e,&f,&g,instr);
if (a%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (b%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (c%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (d%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (e%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (f%2==0)
fprintf(fp,"O");
else
fprintf(fp,"X");
if (g%2==0)
fprintf(fp,"O ");
else
fprintf(fp,"X ");
len = strlen(instr);
for (i=0;i<len;i+=2)
if((instr[i]-'0')+(instr[i+1]-'0') <= 5)
fprintf(fp,"O");
else
fprintf(fp,"X");
fputc('\n',fp);
fclose(fp);
}

Answer 2

fprintf(fp, "%s", "你要加进去的值")

追问

谢谢，查到了，是忘了加这个了：fopen。