why I am getting Runtime Error(SIGSEGV) ?

general
, ,
1

#include
#include
#include<math.h>
using namespace std;

int main(){
int test,i,ValueOfCoin,j,temp,difference,k=0,sum=0;
vector coins;
vector differences;
vector < vector > vec;
cout<<"Input Number of Test cases ";
cin>>test;
int NumberOfCoins;
if(test>=1 && test<=100){
while(test–){
cout<<"Input number of coins ";
cin>>NumberOfCoins;
if(NumberOfCoins>=2 && NumberOfCoins<=100000){
for(i=0;i<NumberOfCoins;i++){
cout<<"Value of coin ";
cin>>ValueOfCoin;
if(ValueOfCoin>=1 && ValueOfCoin<=1000000){
sum=sum+ValueOfCoin;
if(sum<=2000){
coins.push_back(ValueOfCoin);
}
}
else{
continue;
}
}
}
else{
continue;
}

		if(coins.size()==1){
			coins.clear();
			continue;
		}
		else{
			vec.push_back(coins);
			for(i=0;i<coins.size()-1;i++){
				difference=abs(vec[k][i]-vec[k][i+1]);
				differences.push_back(difference);
			}
			if(NumberOfCoins>=2 && coins.size()>=2){
				difference=abs(vec[k][0]-vec[k][NumberOfCoins-1]);
				differences.push_back(difference);
		
				for(i=0;i<coins.size();i++){
					for( j=0;j<coins.size()-i-1;j++){
						if(differences[j]>differences[j+1]){
							temp=differences[j+1];
							differences[j+1]=differences[j];
							differences[j]=temp;
						}
					}
				}
			}
			cout<<"min. difference is "<<differences[0]<<endl;
			differences.clear();
			coins.clear();
			k=k+1;
		}
	}
}
return 0;

}

2

A SIGSEGV is an error(signal) caused by an invalid memory reference or a segmentation fault. You are probably trying to access an array element out of bounds or trying to use too much memory.

Because for the test case when values of coins are all 0 and other similar cases. Your code is trying to access memory which is not defined for it.

difference=abs(vec[k][i]-vec[k][i+1]);

Hence, it is giving runtime error.

3

thx for your reply