/*
Chooses the calculation function wanted. Accepts operand 1, operand 2 and a pointer to the operator.
Returns the value calculated by the operating functions.
*/
float calculate(float n1, float n2, int *op) {
switch (*op) { // compares to the value of the pointer to the operator.
case '+':
return plus1(n1,n2);
break;
case '-':
return minus1(n1,n2);
break;
case '/':
return divide1(n1,n2);
break;
case '*':
return multiply1(n1,n2);
break;
case '^':
return xor1(n1,n2);
break;
case '|':
return or1(n1,n2);
break;
case '&':
return and1(n1,n2);
break;
default:
break;
}
}
int main(int argc, const char *argv[])
{
int a,b,ad,su,mu,de,mo;
char i;
fun add1;//申请一个地址空间
add1=add;//把函数add的入口地址赋给add1
fun subtract1;
subtract1=subtract;
fun multiply1;
multiply1=multiply;
fun dev1;
dev1=dev;
fun mod1;
mod1=mod;
while(1)
{
printf("Input a symbol:\n");
scanf("%c",&i);
if(i=='#') break;
printf("Input num1:\n");
scanf("%d",&a);
printf("Input num2:\n");
scanf("%d",&b);
ad=add1(a,b);
getchar();//因为输入完成之后要回车才能输入字符，程序会把回车当字符读入造成程序出乱，所以加上getchar（）
switch(i)
{
case '+':
ad=add1(a,b);
printf("%d + %d= %d\n",a,b,ad);
break;
case '-':
su=subtract1(a,b);
printf("%d - %d= %d\n",a,b,su);
break;
case '*':
mu=multiply1(a,b);
printf("%d * %d= %d\n",a,b,mu);
break;
case '/':
de=dev1(a,b);
printf("%d / %d= %d\n",a,b,de);
break;
case '%':
mo=mod1(a,b);
printf("%d %% %d= %d\n",a,b,mo);
//打印%的时候 中间要加一个%分开 否则会出错误
break;
}
}
return 0;
}
int main(void) {
benchmark(400,1,multiply2);
int i,j;
FILE* in = fopen("input.txt","r");
// reading matrix a
fscanf(in,"%d %d",&m,&p);
a = read_matrix(in,m,p);
// reading matrix b
fscanf(in,"%d %d",&q,&n);
b = read_matrix(in,q,n);
if (p!=q){
printf("incompatible matrices --not supported\n");
return 0;
}
//initializing matrix c
c = (int**) malloc(sizeof(int *)*m);
for (i = 0; i < m; ++i){
c[i] = (int *) malloc(sizeof(int)*n);
for (j = 0; j < n; ++j)
c[i][j] = 0;
}
long long t1,t2;
FILE* out = fopen("output.txt","w");
// multiply(a,b,c);
// multiply(a,b,c);
// multiply(a,b,c);
for (i = 0; i < m; ++i)
for (j = 0; j < n; ++j)
c[i][j] = 0;
fprintf(out,"result of non-threaded multiplication\n");
t1 = curTime();
multiply(a,b,c);
t2 = curTime();
writeMat(c,m,n,out);
fprintf(out,"elapsed time = %lld usec\n\n",t2-t1);
for (i = 0; i < m; ++i)
for (j = 0; j < n; ++j)
c[i][j] = 0;
fprintf(out,"result of multiplication1 (thread for each cell)\n");
t1 = curTime();
multiply1();
t2 = curTime();
writeMat(c,m,n,out);
fprintf(out,"elapsed time = %lld usec\n\n",t2-t1);
for (i = 0; i < m; ++i)
for (j = 0; j < n; ++j)
c[i][j] = 0;
fprintf(out,"result of multiplication2 (thread for each row)\n");
t1 = curTime();
multiply2();
t2 = curTime();
writeMat(c,m,n,out);
fprintf(out,"elapsed time = %lld usec\n\n",t2-t1);
fclose(out);
print(c,m,n);
return 0;
}
