Comp Sci C++ program-help printing columns and rows

Click For Summary
The discussion focuses on a C++ program aimed at printing the approximation of e^x from 1 to 100 in a structured format of 20 rows and 5 columns. The current implementation produces misaligned output and trailing zeros, indicating issues with formatting and variable initialization. The code includes nested loops for row and column management but lacks proper handling of the factorial calculation and output formatting. Suggestions for improvement include ensuring consistent spacing and correctly initializing variables to avoid garbage values. The goal is to achieve a clean and organized display of the results.
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C++ program--help printing columns and rows

Homework Statement


Print the approx of e^x from 1 to 100. It might not fit on screen so for example print out in 10 columns and 10 rows.

Homework Equations


Code: 
        int row =1; 
       while (row < 20)
       {
            int column = 1;

            while (column < 5)
            {
             cout << endl;
             column++;
            }
       row++; 
       }

The Attempt at a Solution



I'm trying to print out 20 rows and 5 columns of the approx of e^x from 1 to 100. Right now I'm only concerned about the print out. Right now its an ugly mess. Everything seems shifted over and there is no uniform columns. Then at the end there is a mess of zeros. Here is the code
Code: 
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    double ex, realex, x, fact;

    cout << "Enter x:";
    cin >> x;
    
    
        int row = 1;

        while (row < 20)
        {
            int column = 1;

            while (column < 5)
            {
                for (int n = 1; n < 100; n++)
    		{
        	    fact *= n;
        	    ex = (pow(x, n))/fact;
		    cout << ex << " ";
                    
                }
            column++;
            cout << endl;
    
            }
	row++;
        }

    realex = exp(x);
    cout << "Function ex from cmath: " << realex << endl;

    return 0;
}
output:
Code: 
Enter x:2
4.11584e+269 4.11584e+269 2.7439e+269 1.37195e+269 5.48779e+268 1.82926e+268 5.22647e+267 1.30662e+267 2.90359e+266 5.80719e+265 1.05585e+265 1.75975e+264 2.70731e+263 3.86759e+262 5.15679e+261 6.44598e+260 7.58351e+259 8.42612e+258 8.8696e+257 8.8696e+256 8.44724e+255 7.67931e+254 6.67766e+253 5.56472e+252 4.45177e+251 3.42444e+250 2.53662e+249 1.81187e+248 1.24957e+247 8.33045e+245 5.37449e+244 3.35905e+243 2.03579e+242 1.19752e+241 6.84299e+239 3.80166e+238 2.05495e+237 1.08155e+236 5.54643e+234 2.77322e+233 1.35279e+232 6.44185e+230 2.99621e+229 1.36191e+228 6.05295e+226 2.63172e+225 1.11988e+224 4.66616e+222 1.90456e+221 7.61822e+219 2.98754e+218 1.14905e+217 4.33605e+215 1.60594e+214 5.8398e+212 2.08564e+211 7.31804e+209 2.52346e+208 8.55411e+206 2.85137e+205 9.34876e+203 3.01573e+202 9.57374e+200 2.99179e+199 9.20552e+197 2.78955e+196 8.32702e+194 2.44912e+193 7.09891e+191 2.02826e+190 5.71341e+188 1.58706e+187 4.3481e+185 1.17516e+184 3.13377e+182 8.24676e+180 2.14201e+179 5.49235e+177 1.39047e+176 3.47617e+174 8.58313e+172 2.09345e+171 5.04445e+169 1.20106e+168 2.82602e+166 6.57214e+164 1.51084e+163 3.43372e+161 7.71623e+159 1.71472e+158 3.76861e+156 8.19263e+154 1.76186e+153 3.74863e+151 7.89185e+149 1.64414e+148 3.38997e+146 6.91831e+144 1.39764e+143
4.41017e+113 4.41017e+113 2.94011e+113 1.47006e+113 5.88022e+112 1.96007e+112 5.60021e+111 1.40005e+111 3.11123e+110 6.22246e+109 1.13136e+109 1.88559e+108 2.90091e+107 4.14416e+106 5.52555e+105 6.90694e+104 8.12581e+103 9.02868e+102 9.50387e+101 9.50387e+100 9.0513e+99 8.22846e+98 7.15518e+97 5.96265e+96 4.77012e+95 3.66932e+94 2.71802e+93 1.94144e+92 1.33892e+91 8.92617e+89 5.75882e+88 3.59926e+87 2.18137e+86 1.28316e+85 7.33234e+83 4.07352e+82 2.2019e+81 1.1589e+80 5.94306e+78 2.97153e+77 1.44953e+76 6.90251e+74 3.21047e+73 1.4593e+72 6.48579e+70 2.81991e+69 1.19996e+68 4.99984e+66 2.04075e+65 8.163e+63 3.20118e+62 1.23122e+61 4.64612e+59 1.72079e+58 6.2574e+56 2.23479e+55 7.84136e+53 2.70392e+52 9.16582e+50 3.05527e+49 1.00173e+48 3.23138e+46 1.02584e+45 3.20574e+43 9.86381e+41 2.98903e+40 8.92249e+38 2.62426e+37 7.60655e+35 2.1733e+34 6.12197e+32 1.70055e+31 4.65904e+29 1.2592e+28 3.35786e+26 8.83648e+24 2.29519e+23 5.8851e+21 1.4899e+20 3.72475e+18 9.19691e+16 2.24315e+15 5.40518e+13 1.28695e+12 3.02811e+10 7.04212e+08 1.61888e+07 367927 8268.02 183.734 4.0381 0.0877849 0.00188785 4.0167e-05 8.4562e-07 1.76171e-08 3.63239e-10 7.41304e-12 1.49758e-13
4.72554e-43 4.72554e-43 3.15036e-43 1.57518e-43 6.30072e-44 2.10024e-44 6.00069e-45 1.50017e-45 3.33371e-46 6.66743e-47 1.21226e-47 2.02043e-48 3.10836e-49 4.44051e-50 5.92068e-51 7.40085e-52 8.70689e-53 9.67432e-54 1.01835e-54 1.01835e-55 9.69857e-57 8.81688e-58 7.66685e-59 6.38904e-60 5.11123e-61 3.93172e-62 2.91238e-63 2.08027e-64 1.43467e-65 9.56448e-67 6.17063e-68 3.85664e-69 2.33736e-70 1.37492e-71 7.85667e-73 4.36482e-74 2.35936e-75 1.24177e-76 6.36805e-78 3.18402e-79 1.55318e-80 7.39611e-82 3.44005e-83 1.56366e-84 6.94959e-86 3.02156e-87 1.28577e-88 5.35738e-90 2.18669e-91 8.74674e-93 3.4301e-94 1.31927e-95 4.97837e-97 1.84384e-98 6.70487e-100 2.3946e-101 8.4021e-103 2.89727e-104 9.82127e-106 3.27376e-107 1.07336e-108 3.46246e-110 1.09919e-111 3.43498e-113 1.05692e-114 3.20278e-116 9.56054e-118 2.81192e-119 8.1505e-121 2.32871e-122 6.55976e-124 1.82215e-125 4.99221e-127 1.34924e-128 3.59799e-130 9.46838e-132 2.45932e-133 6.30595e-135 1.59644e-136 3.99111e-138 9.85459e-140 2.40356e-141 5.79171e-143 1.37898e-144 3.24465e-146 7.5457e-148 1.73464e-149 3.94237e-151 8.85927e-153 1.96873e-154 4.32687e-156 9.40624e-158 2.02285e-159 4.30393e-161 9.06091e-163 1.88769e-164 3.89214e-166 7.94315e-168 1.60468e-169
5.06347e-199 5.06347e-199 3.37564e-199 1.68782e-199 6.75129e-200 2.25043e-200 6.4298e-201 1.60745e-201 3.57211e-202 7.14422e-203 1.29895e-203 2.16491e-204 3.33064e-205 4.75805e-206 6.34407e-207 7.93009e-208 9.32952e-209 1.03661e-209 1.09117e-210 1.09117e-211 1.03921e-212 9.44737e-214 8.21511e-215 6.84592e-216 5.47674e-217 4.21288e-218 3.12065e-219 2.22904e-220 1.53727e-221 1.02484e-222 6.61189e-224 4.13243e-225 2.50451e-226 1.47324e-227 8.41851e-229 4.67695e-230 2.52808e-231 1.33057e-232 6.82343e-234 3.41171e-235 1.66425e-236 7.925e-238 3.68605e-239 1.67548e-240 7.44656e-242 3.23764e-243 1.37772e-244 5.74049e-246 2.34306e-247 9.37223e-249 3.67538e-250 1.41361e-251 5.33437e-253 1.97569e-254 7.18434e-256 2.56584e-257 9.00293e-259 3.10446e-260 1.05236e-261 3.50786e-263 1.15012e-264 3.71006e-266 1.1778e-267 3.68062e-269 1.1325e-270 3.43181e-272 1.02442e-273 3.013e-275 8.73334e-277 2.49524e-278 7.02885e-280 1.95246e-281 5.3492e-283 1.44573e-284 3.85528e-286 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Function ex from cmath: 7.38906
 
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Problem: Right now I'm only concerned about the print out. Right now its an ugly mess.

Solution: For neat output, you have to supply the formatting, the function sprintf() will be of some assistance. There are various ways to acomplish this formatting on the fly. The first method is to group your row data, then format all at the same time, whereas the other method, is to index the output string at fixed column intervals and insert the data, as you calculate it, at itz relevant column position. C also has formatting codes, for integer, string, floats and so on. Check it out, it will make your output look like a nice table, once you plan it correctly.

happy computing (**).
 

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