int a=3; main(){int s=0;{int a=5;s+=a++;}s+=a++;printf("%d\n",s);}

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int a=3; main(){int s=0;{int a=5;s+=a++;}s+=a++;printf(

int a=3; main(){int s=0;{int a=5;s+=a++;}s+=a++;printf("%d\n",s);}
int a=3; main(){int s=0;{int a=5;s+=a++;}s+=a++;printf("%d\n",s);}

int a=3; main(){int s=0;{int a=5;s+=a++;}s+=a++;printf("%d\n",s);}
这个输出为8,
int a=3;//定义全局变量
main()
{int s=0;
{int a=5;
s+=a++;//这里计算后s的值为5,因为a++是先算a的值,然后在加1,所以此时a的值为5,这条语句执行结束后才会变为6!
}
s+=a++;这里的a为全局变量3,而并非局部变量5,局部变量为5的a只在它所在的那条花括号里的快语句中起作用,这也是变量作用域的定义,所以s的值就为5+3=8
printf("%d\n",s);
}

#include using namespace std; int main() { int a,b,c; a=3; int f(int x,int y,int z);#include using namespace std; int main() {int a,b,c;a=3;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout #include int a=3,b=5; max (int a,int b) {int c; c=a>b?a:b; return (c); } void main() {int void main() {int t=1;fun(fun(t));} fun(int h) {stvoid main(){int t=1;fun(fun(t));}fun(int h){static int a[3]={1,2,3}; int k; for(k=0;k C++题目看不懂,结果是怎么算出来的,#includeusing std::cin;using std::cout;using std::endl;float f1(int);float f2(int);double twice(float (*)(int),int);int main(){int a=3;int b=5;cout 矩阵相加(C++)#include using namespace std; const int rows=3;const int cols=3;void matrixadd(int *,int *,int *,int,int);int main(){int a[rows][cols]={{1,3,5},{7,8,11},{13,15,17}};int b[rows][cols]={{9,8,7},{6,5,4},{3,2,1}};int c[rows][cols]={0 main() {int t=1;fun(fun(t));} fun(int h){static int a[3]={1,2,3};int k; for(k=0;k #include int b=2; int fun(int *k) {b=*k+b;return(b);} main() {int a[10]={1,2,3,4,5,6,7,8}, #include int f1(int a,int b)15,9 { int c; c=b%2; return a+c; }int f2(int a,int b){ int c;a+=a;b+=b;c=f1(a+b=14,++b9);return c;}void main(){ int a=3,b=4;cout #include void main(){ int b=3;int a; int arr[]={6,7,8,9,10}; int *ptr=arr; *(ptr++)+=123;#include using namespace std;void main(){ int b=3;int a; int arr[]={6,7,8,9,10}; int *ptr=arr; *(ptr++)+=123; printf(%d,%d ,*(p #include int b=2; int fun(int*k) { b=*k+b;return(b);} main() {int a[10]={1,2,3,4,5,6,7,8}#include int b=2; int fun(int*k) { b=*k+b;return(b);} main() {int a[10]={1,2,3,4,5,6,7,8},i;for(i=2;i main() { int x=1,y=2,z=3; int r; r=func(x+y+z,x++,++y); printf(%d,r); } int func(int a,int b,intint func(int a,int b,int c){int d;d=a+b+c;return d;} #includeint a(int x);int b(int y);int main(){int m,n;n=6;m=a(n);printf(%d ,m);return 0;}int a(int x){x=b(x+3);return x;}int b(int y){return y+1;} #include int call(int s[],int y) { static int t=3; y=s[t--]; return(y); } void main() { in#includeint call(int s[],int y){static int t=3;y=s[t--];return(y);}void main(){int a[]={3,8,4,2},n,x=0;for(n=0;n #include void main( ) { int a=3,b=5; int *p,*q; void f1(int x,int y);void f2(int *x,int *y);p=&a; q=&b;f1(*p,*q) ;printf(a=%d ,b=%d ,a,b);f2(p,q);printf(a=%d ,b=%d ,a,b);}void f1(int x,int y) { int t;t=x; x=y; y=t;}void f2(int *x,int *y) { int int a=3; main(){int s=0;{int a=5;s+=a++;}s+=a++;printf(%d ,s);} int fm(int a,int b) {if(b==1)return a; else return a+fm(a,b-1); } main( ) { printf(%d ,fm(4,3)) int fm(int a,int b) {if(b==1)return a; else return a+fm(a,b-1); } main( ) { printf(%d ,fm(4,3) void fun(int a,int b) { int t; t=a;a=b;b=t; } main()void fun(int a,int b){ int t; t=a;a=b;b=t; } main() { int c[10]={1,2,3,4,5,6,7,8,9,0}.i; for(i=0;i