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#include <stdio.h>

typedef struct {
    char name[50];
    int age;
} Persona;

int main(){

    Persona p;
    FILE *fbin;

    fbin = fopen("marta.dat", "wb");

    if(fbin == NULL) {
        printf("Error opening file");
        return 1;
    } else {

        for(int i = 0; i < 3; i++) {
            printf("Name: ");
            scanf("%s", p.name);
            printf("Age: ");
            scanf("%d", &p.age);

            fwrite(&p, sizeof(Persona), 1, fbin);

        }

        fclose(fbin);

    }

    return 0;
}
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