1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
| #include <stdio.h>
typedef union
{
unsigned long long g;
unsigned long p[2];
}
i64_u;
long taille(FILE* fd)
{
long size;
fseek(fd, 0, SEEK_END);
size = ftell(fd);
return size;
}
void addition (FILE* a, FILE* b, FILE* c)
{
i64_u alpha,beta,temp;
unsigned long aa,bb;
unsigned long long cc;
fread(&aa,1,sizeof(unsigned long),a);
printf("\n>>>> %lu\n",aa);
alpha.p[1]=aa;
fread(&bb,1,sizeof(unsigned long),b);
beta.p[1]=bb;
temp.g=alpha.g+beta.g;
cc=temp.g;
printf("\n>> %llu %llu %llu %d",temp.g, alpha.g, beta.g,taille(a));
fwrite(&cc,1,sizeof(unsigned long long),c);
}
int main() {
unsigned long a=11111,b=2222;
unsigned long long c;
FILE *f1,*f2,*f3;
f1=fopen("a","wb");
f2=fopen("b","wb");
f3=fopen("c","wb");
fwrite(&a,1,sizeof(unsigned long),f1);
fwrite(&b,1,sizeof(unsigned long),f2);
printf("\n%d %d %d\n",taille(f1),taille(f2),taille(f3));
addition(f1,f2,f3);
printf("\n%d %d %d\n",taille(f1),taille(f2),taille(f3));
fread(&c,1,sizeof(unsigned long long),f3);
printf("\nc: %llu\n",c);
return 0;
} |
Partager