西北农林科技大学 c语言上机 实习8答案由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“c语言上机实习报告”。
1.文本文件中字符个数统计 #include #include int main(void){
char ch, filename[200];
int count = 0;
FILE *fp;
scanf(“%s”, filename);
if((fp = fopen(filename, “r”))== NULL)
{
printf(“File open error!n”);
exit(1);
}
while((ch = fgetc(fp))!= EOF)
{
count++;
}
printf(“%dn”,count);
if(fclose(fp))
{
printf(“File close error!n”);
exit(1);
}
return 0;}
2.文件中数据的排序 #include #include int main(void){
int a[10], temp = 0, i = 0, j = 0, k = 0;
char filename1[80], filename2[80];
FILE *fp1,*fp2;
scanf(“%s”, filename1);
scanf(“%s”, filename2);
if((fp1 = fopen(filename1, “rb”))== NULL)
{
printf(“Input file open error!n”);
exit(1);
}
if((fp2 = fopen(filename2,“wb”))== NULL)
{
printf(“Output file create error!n”);
exit(1);
}
for(i = 0;i
{
fread(&a[i], sizeof(int), 1, fp1);
/* 读出数据 */
}
for(i = 0;i
{
k = i;
for(j = i + 1;j
if(a[k] > a[j])k = j;
if(k!= i)
{
temp = a[k];
a[k] = a[i];
a[i] = temp;
}
} for(i = 0;i
/*
{
fwrite(&a[i], sizeof(int), 1, fp2);
}
if(fclose(fp1))
{
printf(“Input file close error!n”);
exit(1);
}
if(fclose(fp2))
{
printf(“Output file close error!n”);
exit(1);
}
/*验证结果的代码，请不要改动*/
if((fp1 = fopen(filename2, “rb”))== NULL)
{
printf(“Result file open error!n”);
exit(1);
}
/* 排序 */ 写入数据 */
for(i = 0;i
{
fread(&a[i], sizeof(int), 1, fp1);
/* 读出数据 */
}
if(fclose(fp1))
{
printf(“Result file close error!n”);
exit(1);
}
for(i = 0;i
printf(“%d ”, a[i]);
printf(“%dn”, a[i]);
return 0;} 3 二进制数据文件/ #include #include int main(void){
int a[10], temp = 0, i = 0, j = 0, k = 0;
char filename1[80], filename2[80];
FILE *fp1,*fp2;
scanf(“%s”, filename1);
scanf(“%s”, filename2);
if((fp1 = fopen(filename1, “r”))== NULL)
{
printf(“Input file open error!n”);
exit(1);
}
if((fp2 = fopen(filename2, “wb”))== NULL)
{
printf(“Output file open error!n”);
exit(1);
}
for(i = 0;i
{
fscanf(fp1, “%d”, &a[i]);
fwrite(&a[i], sizeof(int), 1, fp2);
}
if(fclose(fp1))
{
printf(“Input file close error!n”);
exit(1);
}
if(fclose(fp2))
{
printf(“Output file close error!n”);
exit(1);
}
if((fp1 = fopen(filename2, “rb”))== NULL)
{
printf(“Result file open error!n”);
exit(1);
}
for(i = 0;i
{
fread(&a[i], sizeof(int), 1, fp1);
}
if(fclose(fp1))
{
printf(“Result file close error!n”);
exit(1);
}
for(i = 0;i
printf(“%d ”, a[i]);
printf(“%dn”, a[i]);
return 0;}
4.比较2个文本文件的内容 #include #include int main(void){
int i = 1, flag = 0;
char filename1[80], filename2[80];
FILE *fp1, *fp2;
/* 读出数据 */
scanf(“%s”, filename1);
scanf(“%s”, filename2);
if((fp1 = fopen(filename1, “r”))== NULL)
{
printf(“Input file1 open error!n”);
exit(1);
}
if((fp2 = fopen(filename2,“r”))== NULL)
{
printf(“Input file2 open error!n”);
exit(1);
}
while(!feof(fp1))
{
if(fgetc(fp1)== fgetc(fp2))
i++;
else
{
flag = 1;
break;
}
}
if(flag)
printf(“%dn”, i);
else
printf(“is equaln”);if(fclose(fp1))
{
printf(“Input file1 close error!n”);
exit(1);
}
if(fclose(fp2))
{
printf(“Input file2 close error!n”);
exit(1);
}
return 0;}
