C&C++常用小函数 代码

#include "stdafx.h"
#include <stdlib.h>
#include "string.h"
#include  "stdio.h"
int   main()
{
FILE *fp;
int number[3];
int score[3];
int i = 0;
int rece_Number = 0;
if((fp = fopen("test.txt","r")) == NULL)
{
fprintf(stderr,"Error opening file!/n");
}
for(i =0;i<3;i++)
{
fscanf(fp,"%d %d",&number[i],&score[i]);//学号与成绩用空格
}
printf("Please input number:/n");
scanf("%d",&rece_Number);
for(i = 0;i<3;i++)
{
if(rece_Number == number[i])
break;
}
printf("The Number's score is %d/n",score[i]);
fclose(fp);
return 0;
}

#include "stdafx.h"
#include "string.h"
#include "malloc.h"

int main()
{
int i,j,k,t;
int max = 0;
char *p = NULL;
char str[42] = "2xtuaojy5678zuaojy908puaojy417uaojy356";
char temp[8];
char result[8];
memset(result,0,8);
p = str;
for(i=0;i <42;i++)
{
for(j=i+1;j <42;j++)
{
if(*(p+i)== *(p+j))
{
t = i;
k = 0;
memset(temp,0,8);
//只要找到了相同的首字符，就开始比较直到没有相同的字符，记录当前字符串，看是否是最长的
while(*(p+t)== *(p+j))
{
temp[k] = *(p+t);//不断比较后续的字符
t++;
j++;
k++;
}
if(k > max)//将最长的字符串赋值给result
{
max = strlen(temp);
strcpy(result,temp);
}

}

}

}
//打印出结果在上述字符串中最长的是 "zuaojy"
printf("重复字符串最长的是 %s,长度为 %d /n",result,max);
return 0;
}

int count_times(char ch,const char* str)
{
int count = 0;
if(*str == '/0')
{
count = 0;
}
else
{
if((*str)==ch)
{
count = 1+count_times(ch,str+1);
}
else
{
count = count_times(ch,str+1);
}
}
return count;
}