BasicMath

So this is my BasicMath solution, a bit late but still in




#include <cstring>
#include <cmath>
#include <cstdlib>
#include <iostream>
using namespace std;

int isNum(int length, char* h){
    int result;
    int i;
    int x;
for(i=0;i<length;i++){
result = isnan(h[i]);
if(result==0){x++;}
}
if(x>0){return 1;}
else{return 0;}
}

int main(int argc, char* argv[]){
    int length;
    int i;
    int x;
    int y;
    int lengthOne;
    int lengthTwo;
    char* hOne;
    char* hTwo;
    int isNumOne;
    int isNumTwo;
    lengthOne = strlen(argv[1]);
    lengthTwo = strlen(argv[3]);
    hOne = argv[1];
    hTwo = argv[3];
    isNumOne = isNum(lengthOne, hOne);
    isNumTwo = isNum(lengthTwo, hTwo);
    if(isNumOne==1 && isNumTwo==1){
        x = atoi(hOne);
        y = atoi(hTwo);
        if(*argv[2]=='+'){cout<<x + y<<endl;}
        else if(*argv[2]=='-'){cout<<x-y<<endl;}
        else if(*argv[2]=='x'){cout<<x*y<<endl;}
        else if(*argv[2]=='/'){cout<<x/y<<endl;}
    }
    else{cout<<"<number> <+-x/> <number><ENTER>"<<endl;}
return 0;
}