Hello, I'm currently doing the Lasagna Master exercise and some issues with type inconsistencies are popping up that I don't exactly understand. It's looking like the size of a vector isn't able to be compared to an int, and I don't know how to resolve that. Any help would be appreciated.
#C++ Lasagna Master Type inconsistencies
fierce kelp
lasagna-master.cpp: ```#include "lasagna_master.h"
namespace lasagna_master {
int preparationTime(std::vectorstd::string layers, int prep_time_per_layer) {
return layers.size() * prep_time_per_layer;
}
amount quantities(std::vector<std::string> layers) {
amount toReturn; toReturn.noodles = 0; toReturn.sauce = 0;
for (int i{0}; i < layers.size(); i++) {
if (layers.at(i) == "noodles") {
toReturn.noodles += 50;
}
else if (layers.at(i) == "sauce") {
toReturn.sauce += 0.2;
}
}
return toReturn;
}
void addSecretIngredient(std::vector<std::string>& curr_ingredients, const std::vector<std::string> needed_ingredients) {
curr_ingredients.back() = needed_ingredients.back();
}
std::vector<double> scaleRecipe(std::vector<double> base, int portions) {
std::vector<double> scaled;
for (int i{0}; i < base.size(); i++) {
scaled.emplace_back(base.at(i) / 2 * portions);
}
return scaled;
}
void addSecretIngredient(std::vector<std::string>& ingredients, std::string secretIngredient) {
ingredients.emplace_back(secretIngredient);
}
} // namespace lasagna_master
lasagna-master.h: ```#pragma once
#include <vector>
#include <string>
namespace lasagna_master {
struct amount {
int noodles;
double sauce;
};
int preparationTime(std::vector<std::string> layers, int prep_time_per_layer = 2);
amount quantities(std::vector<std::string> layers);
void addSecretIngredient(std::vector<std::string>& curr_ingredients, const std::vector<std::string> needed_ingredients);
std::vector<double> scaleRecipe(std::vector<double> base, int portions);
void addSecretIngredient(std::vector<std::string>& ingredients, std::string secretIngredient);
} // namespace lasagna_master
error output: /tmp/lasagna-master/lasagna_master.cpp: In function 'lasagna_master::amount lasagna_master::quantities(std::vector<std::__cxx11::basic_string<char> >)': /tmp/lasagna-master/lasagna_master.cpp:10:26: error: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Werror=sign-compare] 10 | for (int i{0}; i < layers.size(); i++) { | ~~^~~~~~~~~~~~~~~ /tmp/lasagna-master/lasagna_master.cpp: In function 'std::vector<double> lasagna_master::scaleRecipe(std::vector<double>, int)': /tmp/lasagna-master/lasagna_master.cpp:27:26: error: comparison of integer expressions of different signedness: 'int' and 'std::vector<double>::size_type' {aka 'long unsigned int'} [-Werror=sign-compare] 27 | for (int i{0}; i < base.size(); i++) { | ~~^~~~~~~~~~~~~ cc1plus: all warnings being treated as errors make[2]: *** [CMakeFiles/lasagna-master.dir/build.make:90: CMakeFiles/lasagna-master.dir/lasagna_master.cpp.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:85: CMakeFiles/lasagna-master.dir/all] Error 2 make: *** [Makefile:91: all] Error 2
limpid flare
error: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'}
Can you change one of those types to match the other?
If you can't change the type (which you should be able to), you can cast. But that shouldn't be needed.