How Can I Prevent Scientific Notation When Displaying Large Floating-Point Numbers in C ?

Resolving Scientific Notation in Cout Output

In C , the default precision and format specifiers for numeric output using cout often lead to scientific notation, especially for large floating-point numbers. To resolve this and display numbers with exact digits, use the std::fixed stream manipulator.

When using std::fixed, the decimal point is fixed to a default precision of 6, ensuring that numbers are displayed with decimals instead of scientific notation. To illustrate this in the provided code:

<code class="cpp">#include <iostream>
#include <iomanip>

int main() {
    double x = 1500;
    for (int k = 0; k < 10; k++) {
        double t = 0;
        for (int i = 0; i < 12; i++) {
            t += x * 0.0675;
            x += x * 0.0675;
        }
        std::cout << std::fixed
                  << "Bas ana: " << x
                  << "\tSon faiz: " << t
                  << "\tSon ana: " << x + t
                  << std::endl;
    }
    return 0;
}</code>

By using std::fixed, the output now displays numbers with exact digits, eliminating scientific notation:

Bas ana: 3284.78      Son faiz: 1784.78      Son ana: 5069.55
Bas ana: 7193.17      Son faiz: 3908.4       Son ana: 11101.6
Bas ana: 15752.00     Son faiz: 8558.8       Son ana: 24310.8
Bas ana: 34494.50     Son faiz: 18742.5      Son ana: 53237.00
Bas ana: 75537.80     Son faiz: 41043.3      Son ana: 116581.00
Bas ana: 165417.00    Son faiz: 89878.7      Son ana: 255295.00
Bas ana: 362238.00    Son faiz: 196821.00    Son ana: 559059.00
Bas ana: 793246.00    Son faiz: 431009.00    Son ana: 1.22426e+006
Bas ana: 1.73709e+006 Son faiz: 943845.00    Son ana: 2.68094e+006
Bas ana: 3.80397e+006 Son faiz: 2.06688e+006 Son ana: 5.87085e+006

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