C语言上机试题及答案(2)

void main() { FILE *fp; char c; * int count;

* if((fp=fopen(‘mydata.txt’,’r’))==NULL) { printf(\ return; }

while((c=fgetc(fp))!=EOF) * if(c>='0'||c<='9')

count++;

printf(\文件中数字字符的个数:%d\\n\ }

附：答案

第一套

1.编程

#include

void fun(int a,int b,long *c) {

int a1,a10,b1,b10; } main()

{ int a,b;long c; printf(\ } 2.填空 ① 0 ② *p-- 3.改错

scanf(“%d”,s);改为 scanf（“%d”,&s）; if(i%2==0)改为if(i%2!=0) t=t*s1+s;改为t=t+s*s1;

scanf(\ fun(a,b,&c);

printf(\a1=a; a10=a/10; b1=b; b10=b/10;

*c=a10*1000+b10*100+a1*10+b1;

第二套

1.编程

#include void main()

{

int men=0,women,children; while(men<=14) {

women=0; } } 2.填空 ① continue ②k!=0 3.改错

s=s+k/10;改为s=s+k; k=k;改为k=k/10; break;改为continue;

while(women<=20) {

children=30-men-women;

if(3.5*men+2.5*women+1*children==50.0)

printf(\男人%d个,女人%d个，小孩%d个\\n\ women++; } men++;

第三套

1.编程

#include main() { int x=7;

while(!(x%2==1&&x%3==2&&x%5==4&&x%6==5)) { x=x+7;

}

printf(\} 2.填空 ① 1 ② n%i==0 3.改错

int count;改为int count=0;

fopen(‘mydata.txt’,’r’)改为fopen(”mydata.txt” ,”r”) if(c>=’0’||c<=’9’)改为 if(c>=’0’&c<=’9’)