C++之算法题模板

main.cpp:

#include <iostream>
#include <vector>
#include <cstring>
#include <cstdio>
#include <algorithm>
#include <cmath>

using namespace std;

std::vector<string> v;
int len;
void input(){
cin >> len;

}

void output(){
cout << len;
}

int main(){

input();

output();
return 0;
}

 gen.cpp:

#include <iostream>
#include <vector>
#include <cstring>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <ctime>
#include <cstdlib>

using namespace std;

int N=50000,K = 100000;

int main(){
srand(unsigned(time(0)));
cout << N << " " << K << endl;
for (int i = 0 ; i < K ; i++){
cout << rand()%N<<endl;
}

}

Makefile:

CXX = g++
ERROR = 2>error.txt
CXXFLAGS= -g
TARGET = main.exe
SOURCES = main.cpp
IN = < in.txt

TARGET2 = gen.exe
SOURCES2 = gen.cpp
#IN2 = < in.txt
OUT2 = > in.txt

all:$(SOURCES)
$(CXX) $(SOURCES) $(CXXFLAGS) -o $(TARGET) $(ERROR)
$(TARGET) $(IN) $(OUT)

gen:$(SOURCES2)
$(CXX) $(SOURCES2) $(CXXFLAGS) -o $(TARGET2) $(ERROR)
$(TARGET2) $(IN2) $(OUT2)

clean:
del *.exe