Code enters infinite loop

Question

Why is this code on loop infinite?

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

int main()
{
int i;
float salario[10],  valorDataBase, salarioReajustado[10];

printf("Informe o percentual  de reajuste da data-base: \n");
scanf("%f",  &valorDataBase);


    for (i=0 ; i<10 ;  i=i++)
    {
        printf("Informe o seu salario atual: \n");
        scanf("%f", &salario[i]);
    }
    //Impressão da lista de  dados do vetor salario reajustado
    for (i=0 ; i<10 ;  i=i++)
    {
        salarioReajustado[i] = salario[i] + salario[i]*valorDataBase/100;
        printf("Seu salario reajustado sera %f \n",salarioReajustado[i]);
    }

getch();
return(0);
}

Answer 1

And I ask, why are you increasing the variable i and attributing to itself? This is undefined behavior. If only incremental works, then it is correct. You must have miscopied it from somewhere. Anyway the ideal is never copy anything, is to understand how it works to use properly. Simplifying:

#include <stdio.h>

int main() {
    float salario[10], valorDataBase;
    printf("Informe o percentual  de reajuste da data-base: \n");
    scanf("%f", &valorDataBase);
    for (int i = 0; i < 10; i++) {
        printf("Informe o seu salario atual:\n");
        scanf("%f", &salario[i]);
    }
    for (int i = 0; i < 10; i++) printf("Seu salario reajustado sera %f\n", salario[i] + salario[i] * valorDataBase / 100);
}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.

Final tip in real cases monetary values cannot be of the type float.