Check out example codes for "how to represent unsigned char with % c". It will help you in understanding the concepts better.

Code Example 1

#include<stdio. h>
int main(int argc, char *argv[]) {
signed char char1=255;
unsigned char char2=255;
printf("Signed char : %d\n",char1);
printf("Unsigned char : %d\n",char2);
}

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