Little Endian to Big Endian

Code

#include <stdio.h>
#include <stdint.h>

uint32_t convert_endian(uint32_t value) {
    // Write logic to swap bytes
    uint32_t result=0;
    uint32_t *valPtr = &value, *resPtr = &result;
    *((uint8_t *)(resPtr)) = *((uint8_t *)(valPtr)+3);
    *((uint8_t *)(resPtr)+1) = *((uint8_t *)(valPtr)+2);
    *((uint8_t *)(resPtr)+2) = *((uint8_t *)(valPtr)+1);
    *((uint8_t *)(resPtr)+3) = *((uint8_t *)(valPtr));
    return result;
}

int main() {
    uint32_t val;
    scanf("%u", &val);
    printf("%u", convert_endian(val));
    return 0;
}

Solving Approach


 

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Input

305419896

Expected Output

2018915346