用C语言编写一个小程序，要求从1+2+3+……+10000，然后把结果输出.

你确定是到10000吗？16bit的整数会溢出的，32bit绝对没问题的

那可以根据公式来实现1+2+3+……+10000 = 10000（1+10000）/2

所以

#include <stdioh>

int main()

{

int n = 10000;

int sum = 0;

sum = (n+1)n/2;

printf("%d\n",sum);

return 0;

}

/money management system/

#include "stdioh"

#include "dosh"

#include "conioh"

main()

{

FILE fp;

struct date d;

float sum,chm=00;

int len,i,j=0;

int c;

char ch[4]="",ch1[16]="",chtime[12]="",chshop[16],chmoney[8];

pp:

clrscr();

sum=00;

gotoxy(1,1);printf("|---------------------------------------------------------------------------|");

gotoxy(1,2);printf("| money management system(C10) 200003 |");

gotoxy(1,3);printf("|---------------------------------------------------------------------------|");

gotoxy(1,4);printf("| -- money records -- | -- today cost list -- |");

gotoxy(1,5);printf("| ------------------------ |-------------------------------------|");

gotoxy(1,6);printf("| date: -------------- | |");

gotoxy(1,7);printf("| | | | |");

gotoxy(1,8);printf("| -------------- | |");

gotoxy(1,9);printf("| thgs: ------------------ | |");

gotoxy(1,10);printf("| | | | |");

gotoxy(1,11);printf("| ------------------ | |");

gotoxy(1,12);printf("| cost: ---------- | |");

gotoxy(1,13);printf("| | | | |");

gotoxy(1,14);printf("| ---------- | |");

gotoxy(1,15);printf("| | |");

gotoxy(1,16);printf("| | |");

gotoxy(1,17);printf("| | |");

gotoxy(1,18);printf("| | |");

gotoxy(1,19);printf("| | |");

gotoxy(1,20);printf("| | |");

gotoxy(1,21);printf("| | |");

gotoxy(1,22);printf("| | |");

gotoxy(1,23);printf("|---------------------------------------------------------------------------|");

i=0;

getdate(&d);

sprintf(chtime,"%4d%02d%02d",dda_year,dda_mon,dda_day);

for(;;)

{

gotoxy(3,24);printf(" Tab __browse cost list Esc __quit");

gotoxy(13,10);printf(" ");

gotoxy(13,13);printf(" ");

gotoxy(13,7);printf("%s",chtime);

j=18;

ch[0]=getch();

if(ch[0]==27)

break;

strcpy(chshop,"");

strcpy(chmoney,"");

if(ch[0]==9)

{

mm:

i=0;

fp=fopen("homedat","r+");

gotoxy(3,24);printf(" ");

gotoxy(6,4);printf(" list records ");

gotoxy(1,5);printf("|-------------------------------------|");

gotoxy(41,4);printf(" ");

gotoxy(41,5);printf(" |");

while(fscanf(fp,"%10s%14s%f\n",chtime,chshop,&chm)!=EOF)

{

if(i==36)

{

getch();

i=0;

}

if((i%36)<17)

{

gotoxy(4,6+i);

printf(" ");

gotoxy(4,6+i);

}

else

if((i%36)>16)

{

gotoxy(41,4+i-17);

printf(" ");

gotoxy(42,4+i-17);

}

i++;

sum=sum+chm;

printf("%10s %-14s %61f\n",chtime,chshop,chm);

}

gotoxy(1,23);printf("|---------------------------------------------------------------------------|");

gotoxy(1,24);printf("| |");

gotoxy(1,25);printf("|---------------------------------------------------------------------------|");

gotoxy(10,24);printf("total is %81f$",sum);

fclose(fp);

gotoxy(49,24);printf("press any key to");getch();goto pp;

}

else

{

while(ch[0]!='\r')

{

if(j<10)

{

strncat(chtime,ch,1);

j++;

}

if(ch[0]==8)

{

len=strlen(chtime)-1;

if(j>15)

{len=len+1; j=11;}

strcpy(ch1,"");

j=j-2;

strncat(ch1,chtime,len);

strcpy(chtime,"");

strncat(chtime,ch1,len-1);

gotoxy(13,7);printf(" ");

}

gotoxy(13,7);printf("%s",chtime);ch[0]=getch();

if(ch[0]==9)

goto mm;

if(ch[0]==27)

exit(1);

}

gotoxy(3,24);printf(" ");

gotoxy(13,10);

j=0;

ch[0]=getch();

while(ch[0]!='\r')

{

if (j<14)

{

strncat(chshop,ch,1);

j++;

}

if(ch[0]==8)

{

len=strlen(chshop)-1;

strcpy(ch1,"");

j=j-2;

strncat(ch1,chshop,len);

strcpy(chshop,"");

strncat(chshop,ch1,len-1);

gotoxy(13,10);printf(" ");

}

gotoxy(13,10);printf("%s",chshop);ch[0]=getch();

}

gotoxy(13,13);

j=0;

ch[0]=getch();

while(ch[0]!='\r')

{

if (j<6)

{

strncat(chmoney,ch,1);

j++;

}

if(ch[0]==8)

{

len=strlen(chmoney)-1;

strcpy(ch1,"");

j=j-2;

strncat(ch1,chmoney,len);

strcpy(chmoney,"");

strncat(chmoney,ch1,len-1);

gotoxy(13,13);printf(" ");

}

gotoxy(13,13);printf("%s",chmoney);ch[0]=getch();

}

if((strlen(chshop)==0)||(strlen(chmoney)==0))

continue;

if((fp=fopen("homedat","a+"))!=NULL);

fprintf(fp,"%10s%14s%6s",chtime,chshop,chmoney);

fputc('\n',fp);

fclose(fp);

i++;

gotoxy(41,5+i);

printf("%10s %-14s %-6s",chtime,chshop,chmoney);

}

}

getch();

}

编译的时候有debug和release之分

你如果用VC编译器的话,直接编译成release版本,就在你的电脑上产生一个exe文件,直接运行,就能用了

如果你用

gcc

编译器,直接

用gcc

编译

成可执行文件,也可以运行

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