题目内容
（请给出正确答案）
有以下程序
#include＜stdio．h＞
#include＜stdlib．h＞
main()
{int*a，*b，*c；
a=b=c=(int*)malloc(sizeof(int))；
*a=1；*b=2，*c=3；
a=b
printf(”％d，％d，％d＼n”，*a，*b，*c)；
}
程序运行后的输出结果是()。
A．3，3，3
B．2，2，3
C．1，2，3
D．1，1，3
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更多“有以下程序#include＜stdio．h＞#include＜stdlib．h＞main（){int*a，*b，*c；a=b=c=（int*)m”相关的问题
A、1 2
B、1 200
C、100 2
D、100 200
#include <stdio.h> #include <stdlib.h> struct contry { int num; char name[20]; } x[5] = {1,"China", 2, "USA", 3, "France", 4, "Englan", 5, "Spanish"}; int main() { int i; for(i=0; i<5; i++) if(strcmp(x[i].name, "t")> 0) printf("%d\n", x[i].num); return 0; }
A、2
B、3
C、1 2 3 4 5
D、1
include(iostream．h>
include
classTestClass
{
public：
intX，y；
TestClass（）{x=y=0；}
TestClass(inta，intb){x=a；y=b；}
voiddisp（）
{
cout$amp;}
}；
voidmain（）
{
TestClasss1(2，3)；
s1．disp（）；
}
程序执行后的输出结果是（）。
A.100
B.000
C.010
D.001
B.x=2，y=3
C.x=3，y=2
D.x=3，y=3
#include
#include
#include
main()
{ char *p; int i;
p=(char *)malloc(sizeof(char)*20);
strcpy(p,"welcome");
for(i=6;i>=0;i--) putchar(*(p+i));
printf("\n "); free(p);
}
A、a=6, x=10 b=3, y=6
B、a=6, x=10 b=3, y=8
C、a=6, x=12 b=3, y=6
D、以上均不对
调试程序，写出程序的输出结果，并解释 #include <iostream> #include <iostream> using namespace std; class complex { public: complex() { real = imag = 0.0; } complex(double r) { real = r; imag = 0.0; } complex(double r, double i) { real = r; imag = i; } friend complex operator + (const complex &c1, const complex &c2); friend complex operator - (const complex &c1, const complex &c2); friend complex operator * (const complex &c1, const complex &c2); friend complex operator / (const complex &c1, const complex &c2); friend void print(const complex &c); private: double real, imag; }; complex operator+ (const complex &c1, const complex &c2) { return complex(c1.real + c2.real, c1.imag + c2.imag); } complex operator-(const complex &c1, const complex &c2) { return complex(c1.real - c2.real, c1.imag - c2.imag); } complex operator * (const complex &c1, const complex &c2) { return complex(c1.real*c2.real - c1.imag * c2.imag, c1.real*c2.imag + c1.imag * c2.real); } complex operator/(const complex &c1, const complex &c2) { return complex((c1.real*c2.real + c1.imag * c2.imag) / (c2.real*c2.real) / (c2.real*c2.real + c2.imag*c2.imag), (c1.imag*c2.real - c1.real * c2.imag) / (c2.real)*(c2.real + c2.imag*c2.imag)); } void print(const complex &c) { if (c.imag < 0) cout << c.real << c.imag << "i"; else cout << c.real << "+" << c.imag << "i"; } int main() { complex c1(2.0), c2(3.0, -1.0), c3; c3 = c1 + c2; cout << "\ncl+c2="; print(c3); c3 = c1 - c2; cout << "\nc1-c2="; print(c3); c3 = c1 * c2; cout << "\ncl*c2="; print(c3); c3 = c1 / c2; cout << "\nc1/c2="; print(c3); c3 = (c1 + c2)*(c1 - c2) * c2 / c1; cout << "\n(c1 + c2)*(c1 - c2) * c2 / c1="; print(c3); cout << endl; return 0; }
A、goodluck
B、luckgood
C、8
D、9
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