Rounding Floating Point Number To two Decimal Places in C and C++

How to round off a floatig point value to two places. For example, 5.567 should become 5.57 and 5.534 should become 5.53

First Method:- Using Float precision

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#include <iostream>
using namespace std;
int main()
{
    float var = 37.66666;
  
    // Directly print the number with .2f precision
    printf("%.2f", var); 
    return 0;
}

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Output:
37.67




Second Method : Using integer typecast If we are in Function then how return two decimal point value

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#include <iostream>
using namespace std;
float round(float var)
{
    // 37.66666 * 100 =3766.66
    // 3766.66 + .5 =3767.16    for rounding off value
    // then type cast to int so value is 3767
    // then divided by 100 so the value converted into 37.67
    float value = (int)(var * 100 + .5);
    return (float)value / 100;
}
  
int main()
{
    float var = 37.66666;
    cout << round(var);
    return 0;
}

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Output:
37.67


Third Method : using sprintf() and sscanf()

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#include <iostream>
using namespace std;
float round(float var)
{
    // we use array of chars to store number
    // as a string.
    char str[40]; 
  
    // Print in string the value of var 
    // with two decimal point
    sprintf(str, "%.2f", var);
  
    // scan string value in var 
    sscanf(str, "%f", &var); 
  
    return var; 
}
  
int main()
{
    float var = 37.66666;
    cout << round(var);
    return 0;
}

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Output:
37.67





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