2021年C语言考试系统题库.doc

#include <conio.h>
#include <stdio.h>
void main()
{ int arr[10]={11,4,2,7,3,12,5,34,5,9},i;
int s=0;
/************found************/
for ( i=0；i<10；i++)
/************found************/
if (arr[i] % 2 == 1)
s = s + arr[i];
printf("The result is：%d\n"，s);
}

#include "stdio.h"
#include "string.h"
void main( )
{
char s[10]；
unsigned i;
/**************found************/
int n=0;
scanf("%s",s);
/**************found************/
for(i=0;i<strlen(s);i++)
n=n*10+s[i]-'0';
printf("n=%ld\n",n);
}

#include <conio.h>
#include <stdio.h>
double average( int arr[ ]，int n )
{ int k=0,i；double s;
s = 0;
for ( i=0 ;i<n；i++)
/************found************/
if (arr[i] % 2 == 1)
{ s = s + arr[i]；k++；}
return (s/k) ;
}
void main()
{
int a[12]={10,4,2,7,3,12,5,34,5,9,21,18};
double s;
/************found************/
s = average(a,12);
printf("The result is：%.2f\n"，s);
}

#include <math.h>
#include <conio.h>
#include <stdio.h>
void main()
{ int x,y,t,max,min,i,n1,n2;
printf("Please enter two numbers:");
scanf("%d,%d",&x,&y);
if(x > y)
{t = x；x = y；y = t;}
n1=x；n2=y;
t = n2 % n1;
/************found************/
while( n1>n2 )
{
n2 = n1 ;
n1 = t ;
t = n2 % n1;
}
/************found************/
max = t;
min = x * y / max ;
printf("max is ：%d\n",max);
printf("min is ：%d\n",min);
}

#include <stdio.h>
#define N 3
int fun(int a[N][N])
{
int min;
/***********begin***********/
int i,j;
min=a[0][0];
for(i=0;i<N;i++)
{for(j=0;j<N;j++)
{if(a[i][j]<min)min=a[i][j];}}
/************end************/
return min;
}
void main()
{
void NONO( );//函数声明
int a[N][N]={-1,2,3,4,9,5,7,8,6};
int i,j,min；
printf("array is:\n");
for(i=0;i<N;i++)
{
for(j=0;j<N;j++)
printf("%5d",a[i][j]);
printf("\n");
}
min=fun(a);
printf("Result is：%d\n",min);
NONO( );
}
void NONO( )
{ FILE *fr,*fw;
int i,j,k,m,a[N][N];
fr=fopen("D:\\exam\\05910327\\PROGIN.DAT","r");
fw=fopen("D:\\exam\\05910327\\PROGOUT.DAT","w");
for(i=1;i<=5;i++)
{ for(j=0;j<N;j++)
for(k=0;k<N;k++)
{ fscanf(fr,"%d",&a[j][k]);
fprintf(fw,"%4d",a[j][k]);}
fprintf(fw,"Min = %d\n",fun(a));}
fclose(fr);
fclose(fw);
}

#include <conio.h>
#include <stdio.h>
void main()
{ int a[3][3]={4,4,34,37,3,12,5,6,5},i,j,max,min;
max = min = a[0][0];
for ( i=0；i<3；i++)
/************found************/
for ( j=0；j<3；j++)
{ if ( max < a[i][j] )
max = a[i][j];
/************found************/
if (min > a[i][j])
min = a[i][j];
}
printf("The max is：%d\n"，max);
printf("The min is：%d\n"，min);
}

#include <math.h>
#include <conio.h>
#include <stdio.h>
void main()
{ int a[12]={2,3,5,7,8,9,10,11,12,13,15,17},i,j,k,s;
/************found************/
s=0;
for ( i=0；i<12；i++)
{
k=(int)sqrt(a[i]);
for ( j=2;j <= k；j++)
if (a[i] % j == 0)
break;
if( j>k )
/************found************/
s=s+a[i];
}
printf("Sum is：%d\n",s);
}

#include <stdio.h>
#define M 100
void main()
{ int a,b,i;

a=0;b=0;
/**************found************/
for(i=1;i<=M;i+=2)
{ a+=i;
/**************found************/
b+=i+1;
}
printf("sum of evens is %d\n",b);
printf("sum of odds is %d\n",a)；
}

#include <math.h>
#include <conio.h>
#include <stdio.h>
void main()
{ int a[12]={2,3,5,7,8,9,10,11,12,13,15,17},i,j,k,s;
/************found************/
s=0;
for ( i=0；i<12；i++)
{
k=(int)sqrt(a[i]);
for ( j=2;j <= k；j++)
if (a[i] % j == 0)
break;
if( j>k )
/************found************/
s=s+a[i];
}
printf("Sum is：%d\n",s);
}

#include <string.h>
#include <stdio.h>
int fun(char str1[],char ch)
{
/***********begin***********/

/************end************/
}

void main()
{
void NONO( );//函数声明
char str1[80],ch;
int count；
printf("Enter str1:\n");
gets(str1);
printf("Enter ch:\n");
ch=getchar();
count=fun(str1,ch);
printf("Result is：%d\n",count);
NONO( );
}

void NONO( )
{FILE *fr,*fw;
int i，count;
char str[80]，ch;
fr=fopen("D:\\exam\\05910327\\PROGIN.DAT","r")；
fw=fopen("D:\\exam\\05910327\\PROGOUT.DAT","w");
for(i=1；i<=2；i++)
{ fscanf(fr,"%s",str);fgetc(fr);
ch=fgetc(fr);
count=fun(str,ch);
fprintf(fw,"Result is :##%d\n",count)；}
fclose(fr);
fclose(fw);
}