/* graphingUtility.cpp =================== (100%) Graphs a certain function. ********************************************** Write the expression you want to graph inside the function (). Then press . Then enter input values in the following order: lower = lower bound for x upper = upper bound for x increment = interval of values for x. ********************************************** Hope you enjoy it. :)) by: Jaydee Lucero =================== */ #include #include #include #define WIDTH 70 using namespace std; double function(double x) { // Insert expression to graph here. return(sin(x) + sin(2.0*x) + cos(x) + cos(2.0*x) ) ; } int main() { double lower, upper, x_min, x_max, min, max, increment, number, factor ; int spaces, zero, i, blank ; cin >> lower >> upper >> increment ; cout << endl ; x_min = lower ; x_max = upper ; min = function(lower) ; max = function(upper) ; for(number = lower; number <= upper; number += increment) { if( function(number) < min ) { x_min = number ; min = function(number) ; } if( function(number) > max ) { x_max = number ; max = function(number) ; } } factor = (max - min)/WIDTH ; cout << " " ; for(i = 0; i < 15; i++) { if( fabs(5.0*i*factor + min) < 0.01 ) cout << setw(5) << fixed << setprecision(1) << 0 ; else cout << setw(5) << fixed << setprecision(1) << 5.0*i*factor + min ; } cout << endl << " +" ; for(i = 1; i <= WIDTH; i++) { if(i % 5 == 0) cout << "+" ; else cout << "-" ; } cout << endl ; for(number = lower; number <= upper; number += increment) { if( fabs(number) < 0.01 ) cout << setw(6) << fixed << setprecision(2) << 0 <<"|" ; else cout << setw(6) << fixed << setprecision(2) << number << "|" ; spaces = round( (function(number) - min)/factor ) ; zero = round( (0.0 - min)/factor ) ; if( fabs(number) > 0.0000000001 ) { if(zero > spaces) { if(spaces == 0) blank = zero - spaces - 1 ; else blank = zero - spaces ; for(i = 1 ; i < spaces ; i++) cout << " " ; cout << "O" ; for(i = 1; i < blank; i++) cout << " " ; cout << "|" << endl ; } else if(zero < spaces) { for(i = 1; i < zero; i++) cout << " " ; if(min < 0.0) cout << "|" ; for(i = 1; i < spaces - zero; i++) cout << " " ; cout << "O" << endl ; } else { for(i = 1 ; i < spaces ; i++) cout << " " ; cout << "O" << endl ; } } else { for(i = 1; i <= WIDTH; i++) { if(i == spaces) cout << "O" ; else if(i == zero) cout << "+" ; else cout << "-" ; } cout << endl ; } } return 0; }

Graph a Function :)