How to use conversion in assignment in c language

#include<stdio.h>
int main()
{
    char c1,c2;
    int i1,i2;
    float f1,f2;
    c1='H';
    i1=80.56; 
    f1=12.6;
    c2=i1;
    i2=f1;
    printf("c2=%c, i2=%d\n",c2,i2);
    f2=i1;
    i2=c1;
    printf("f2=%.2f, i2=%d\n",f2,i2);
    return 0;
}